diff --git a/boolean/__init__.pyi b/boolean/__init__.pyi
new file mode 100644
index 0000000..b669989
--- /dev/null
+++ b/boolean/__init__.pyi
@@ -0,0 +1,17 @@
+from . import boolean as boolean
+from .boolean import AND as AND
+from .boolean import NOT as NOT
+from .boolean import OR as OR
+from .boolean import PARSE_ERRORS as PARSE_ERRORS
+from .boolean import TOKEN_AND as TOKEN_AND
+from .boolean import TOKEN_FALSE as TOKEN_FALSE
+from .boolean import TOKEN_LPAR as TOKEN_LPAR
+from .boolean import TOKEN_NOT as TOKEN_NOT
+from .boolean import TOKEN_OR as TOKEN_OR
+from .boolean import TOKEN_RPAR as TOKEN_RPAR
+from .boolean import TOKEN_SYMBOL as TOKEN_SYMBOL
+from .boolean import TOKEN_TRUE as TOKEN_TRUE
+from .boolean import BooleanAlgebra as BooleanAlgebra
+from .boolean import Expression as Expression
+from .boolean import ParseError as ParseError
+from .boolean import Symbol as Symbol
diff --git a/boolean/boolean.pyi b/boolean/boolean.pyi
new file mode 100644
index 0000000..61c7b08
--- /dev/null
+++ b/boolean/boolean.pyi
@@ -0,0 +1,231 @@
+import inspect as inspect
+import itertools as itertools
+from collections.abc import Callable, Container, Iterable, Iterator, Mapping
+from functools import reduce as reduce
+from operator import and_ as and_operator
+from operator import or_ as or_operator
+from typing import ClassVar, TypeVar
+
+import boolean.boolean as _boolean
+
+_ValueT = TypeVar("_ValueT")
+
+TRACE_PARSE: bool
+
+TOKEN_AND: int
+TOKEN_OR: int
+TOKEN_NOT: int
+TOKEN_LPAR: int
+TOKEN_RPAR: int
+TOKEN_TRUE: int
+TOKEN_FALSE: int
+TOKEN_SYMBOL: int
+TOKEN_TYPES: dict[int, str]
+
+PARSE_UNKNOWN_TOKEN: int
+PARSE_UNBALANCED_CLOSING_PARENS: int
+PARSE_INVALID_EXPRESSION: int
+PARSE_INVALID_NESTING: int
+PARSE_INVALID_SYMBOL_SEQUENCE: int
+PARSE_INVALID_OPERATOR_SEQUENCE: int
+PARSE_ERRORS: dict[int, str]
+
+class ParseError(Exception):
+    token_type: int | Symbol | None
+    token_string: str
+    position: object
+    error_code: int
+    def __init__(
+        self,
+        token_type: int | Symbol | None = None,
+        token_string: str = "",
+        position: object = -1,
+        error_code: int = 0,
+    ) -> None: ...
+    def __str__(self, *args: object, **kwargs: object) -> str: ...
+
+class BooleanAlgebra:
+    TRUE: BaseElement
+    FALSE: BaseElement
+    NOT: type[_boolean.NOT]
+    AND: type[_boolean.AND]
+    OR: type[_boolean.OR]
+    Symbol: type[_boolean.Symbol]
+    allowed_in_token: Container[str]
+    def __init__(
+        self,
+        TRUE_class: type[BaseElement] | None = None,
+        FALSE_class: type[BaseElement] | None = None,
+        Symbol_class: type[_boolean.Symbol] | None = None,
+        NOT_class: type[_boolean.NOT] | None = None,
+        AND_class: type[_boolean.AND] | None = None,
+        OR_class: type[_boolean.OR] | None = None,
+        allowed_in_token: Container[str] = (".", ":", "_"),
+    ) -> None: ...
+    def definition(
+        self,
+    ) -> tuple[
+        BaseElement,
+        BaseElement,
+        type[_boolean.NOT],
+        type[_boolean.AND],
+        type[_boolean.OR],
+        type[_boolean.Symbol],
+    ]: ...
+    def symbols(self, *args: object) -> tuple[_boolean.Symbol, ...]: ...
+    def parse(
+        self,
+        expr: str | Iterable[tuple[int | _boolean.Symbol, str, object]],
+        simplify: bool = False,
+    ) -> Expression: ...
+    def _start_operation(
+        self,
+        ast: list[object],
+        operation: type[Function],
+        precedence: Mapping[object, int],
+    ) -> list[object]: ...
+    def tokenize(
+        self, expr: str
+    ) -> Iterator[tuple[int | _boolean.Symbol, str, object]]: ...
+    def _recurse_distributive(
+        self, expr: Expression, operation_inst: DualBase
+    ) -> Expression: ...
+    def normalize(
+        self,
+        expr: Expression,
+        operation: type[_boolean.AND] | type[_boolean.OR],
+    ) -> Expression: ...
+    def cnf(self, expr: Expression) -> Expression: ...
+    def conjunctive_normal_form(self, expr: Expression) -> Expression: ...
+    def dnf(self, expr: Expression) -> Expression: ...
+    def disjunctive_normal_form(self, expr: Expression) -> Expression: ...
+
+class Expression:
+    TRUE: ClassVar[BaseElement | None]
+    FALSE: ClassVar[BaseElement | None]
+    NOT: ClassVar[type[_boolean.NOT] | None]
+    AND: ClassVar[type[_boolean.AND] | None]
+    OR: ClassVar[type[_boolean.OR] | None]
+    Symbol: ClassVar[type[_boolean.Symbol] | None]
+    sort_order: int | None
+    args: tuple[Expression, ...]
+    isliteral: bool
+    iscanonical: bool
+    def __init__(self) -> None: ...
+    @property
+    def objects(self) -> set[object]: ...
+    def get_literals(self) -> list[Expression]: ...
+    @property
+    def literals(self) -> set[Expression]: ...
+    def literalize(self) -> Expression: ...
+    def get_symbols(self) -> list[_boolean.Symbol]: ...
+    @property
+    def symbols(self) -> set[_boolean.Symbol]: ...
+    def subs(
+        self,
+        substitutions: Mapping[Expression, Expression],
+        default: Expression | None = None,
+        simplify: bool = False,
+    ) -> Expression: ...
+    def _subs(
+        self,
+        substitutions: Mapping[Expression, Expression],
+        default: Expression | None,
+        simplify: bool,
+    ) -> Expression | None: ...
+    def simplify(self) -> Expression: ...
+    def __hash__(self) -> int: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __ne__(self, other: object) -> bool: ...
+    def __lt__(self, other: object) -> bool: ...
+    def __gt__(self, other: object) -> bool: ...
+    def __and__(self, other: Expression) -> _boolean.AND: ...
+    def __mul__(self, other: Expression) -> _boolean.AND: ...
+    def __invert__(self) -> _boolean.NOT: ...
+    def __or__(self, other: Expression) -> _boolean.OR: ...
+    def __add__(self, other: Expression) -> _boolean.OR: ...
+    def __bool__(self) -> bool: ...
+    def __nonzero__(self) -> bool: ...
+
+class BaseElement(Expression):
+    dual: BaseElement
+    def __init__(self) -> None: ...
+    def __lt__(self, other: object) -> bool: ...
+    def __nonzero__(self) -> bool: ...
+    def __bool__(self) -> bool: ...
+    def pretty(self, indent: int = 0, debug: bool = False) -> str: ...
+
+class _TRUE(BaseElement):
+    def __init__(self) -> None: ...
+    def __hash__(self) -> int: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __str__(self) -> str: ...
+    def __repr__(self) -> str: ...
+    def __call__(self) -> _TRUE: ...
+    def __nonzero__(self) -> bool: ...
+    def __bool__(self) -> bool: ...
+
+class _FALSE(BaseElement):
+    def __init__(self) -> None: ...
+    def __hash__(self) -> int: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __str__(self) -> str: ...
+    def __repr__(self) -> str: ...
+    def __call__(self) -> _FALSE: ...
+    def __nonzero__(self) -> bool: ...
+    def __bool__(self) -> bool: ...
+
+class Symbol(Expression):
+    obj: object
+    def __init__(self, obj: object) -> None: ...
+    def __call__(self, **kwargs: _ValueT) -> _ValueT: ...
+    def __hash__(self) -> int: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __lt__(self, other: object) -> bool: ...
+    def __str__(self) -> str: ...
+    def __repr__(self) -> str: ...
+    def pretty(self, indent: int = 0, debug: bool = False) -> str: ...
+
+class Function(Expression):
+    operator: str | None
+    def __init__(self, *args: Expression) -> None: ...
+    def __str__(self) -> str: ...
+    def __repr__(self) -> str: ...
+    def pretty(self, indent: int = 0, debug: bool = False) -> str: ...
+
+class NOT(Function):
+    def __init__(self, arg1: Expression) -> None: ...
+    def literalize(self) -> Expression: ...
+    def simplify(self) -> Expression: ...
+    def cancel(self) -> Expression: ...
+    def demorgan(self) -> Expression: ...
+    def __call__(self, **kwargs: object) -> bool: ...
+    def __lt__(self, other: object) -> bool: ...
+    def pretty(self, indent: int = 1, debug: bool = False) -> str: ...
+
+class DualBase(Function):
+    _pyoperator: ClassVar[Callable[[object, object], object] | None]
+    identity: BaseElement
+    annihilator: BaseElement
+    dual: type[DualBase]
+    def __init__(
+        self, arg1: Expression, arg2: Expression, *args: Expression
+    ) -> None: ...
+    def __contains__(self, expr: object) -> bool: ...
+    def simplify(self, sort: bool = True) -> Expression: ...
+    def flatten(self) -> DualBase: ...
+    def absorb(self, args: Iterable[Expression]) -> list[Expression]: ...
+    def subtract(self, expr: Expression, simplify: bool) -> Expression | None: ...
+    def distributive(self) -> Expression: ...
+    def __lt__(self, other: object) -> bool: ...
+    def __call__(self, **kwargs: _ValueT) -> _ValueT: ...
+
+class AND(DualBase):
+    def __init__(
+        self, arg1: Expression, arg2: Expression, *args: Expression
+    ) -> None: ...
+
+class OR(DualBase):
+    def __init__(
+        self, arg1: Expression, arg2: Expression, *args: Expression
+    ) -> None: ...
diff --git a/boolean/py.typed b/boolean/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/boolean/test_boolean.pyi b/boolean/test_boolean.pyi
new file mode 100644
index 0000000..6f55236
--- /dev/null
+++ b/boolean/test_boolean.pyi
@@ -0,0 +1,116 @@
+# The bundled test module does not define a supported library API.
+
+import unittest
+
+class BooleanAlgebraTestCase(unittest.TestCase):
+    def test_creation(self) -> None: ...
+    def test_parse_with_mixed_operators_multilines_and_custom_symbol(self) -> None: ...
+    def test_parse_recognizes_trueish_and_falsish_symbol_tokens(self) -> None: ...
+    def test_parse_can_use_iterable_from_alternative_tokenizer(self) -> None: ...
+    def test_parse_with_advanced_tokenizer_example(self) -> None: ...
+    def test_allowing_additional_characters_in_tokens(self) -> None: ...
+    def test_parse_raise_ParseError1(self) -> None: ...
+    def test_parse_raise_ParseError2(self) -> None: ...
+    def test_parse_raise_ParseError3(self) -> None: ...
+    def test_parse_raise_ParseError4(self) -> None: ...
+    def test_parse_raise_ParseError5(self) -> None: ...
+    def test_parse_raise_ParseError6(self) -> None: ...
+    def test_parse_raise_ParseError7(self) -> None: ...
+    def test_parse_raise_ParseError8(self) -> None: ...
+    def test_parse_raise_ParseError9(self) -> None: ...
+    def test_parse_side_by_side_symbols_should_raise_exception_but_not(
+        self,
+    ) -> None: ...
+    def test_parse_side_by_side_symbols_should_raise_exception_but_not2(
+        self,
+    ) -> None: ...
+    def test_parse_side_by_side_symbols_raise_exception(self) -> None: ...
+    def test_parse_side_by_side_symbols_with_parens_raise_exception(self) -> None: ...
+
+class BaseElementTestCase(unittest.TestCase):
+    def test_creation(self) -> None: ...
+    def test_literals(self) -> None: ...
+    def test_literalize(self) -> None: ...
+    def test_simplify(self) -> None: ...
+    def test_simplify_two_algebra(self) -> None: ...
+    def test_dual(self) -> None: ...
+    def test_equality(self) -> None: ...
+    def test_order(self) -> None: ...
+    def test_printing(self) -> None: ...
+
+class SymbolTestCase(unittest.TestCase):
+    def test_init(self) -> None: ...
+    def test_isliteral(self) -> None: ...
+    def test_literals(self) -> None: ...
+    def test_literalize(self) -> None: ...
+    def test_simplify(self) -> None: ...
+    def test_simplify_different_instances(self) -> None: ...
+    def test_equal_symbols(self) -> None: ...
+    def test_order(self) -> None: ...
+    def test_printing(self) -> None: ...
+
+class NOTTestCase(unittest.TestCase):
+    def test_init(self) -> None: ...
+    def test_isliteral(self) -> None: ...
+    def test_literals(self) -> None: ...
+    def test_literalize(self) -> None: ...
+    def test_simplify(self) -> None: ...
+    def test_cancel(self) -> None: ...
+    def test_demorgan(self) -> None: ...
+    def test_order(self) -> None: ...
+    def test_printing(self) -> None: ...
+
+class DualBaseTestCase(unittest.TestCase):
+    maxDiff: int | None
+    def test_init(self) -> None: ...
+    def test_isliteral(self) -> None: ...
+    def test_literals(self) -> None: ...
+    def test_literalize(self) -> None: ...
+    def test_annihilator(self) -> None: ...
+    def test_identity(self) -> None: ...
+    def test_dual(self) -> None: ...
+    def test_simplify(self) -> None: ...
+    def test_absorption_invariant_to_order(self) -> None: ...
+    def test_parse_complex_expression_should_create_same_expression_as_python(
+        self,
+    ) -> None: ...
+    def test_simplify_complex_expression_parsed_with_simplify(self) -> None: ...
+    def test_complex_expression_without_parens_parsed_or_built_in_python_should_be_identical(
+        self,
+    ) -> None: ...
+    def test_simplify_complex_expression_parsed_then_simplified(self) -> None: ...
+    def test_parse_invalid_nested_and_should_raise_a_proper_exception(self) -> None: ...
+    def test_subtract(self) -> None: ...
+    def test_flatten(self) -> None: ...
+    def test_distributive(self) -> None: ...
+    def test_equal(self) -> None: ...
+    def test_order(self) -> None: ...
+    def test_printing(self) -> None: ...
+
+class OtherTestCase(unittest.TestCase):
+    def test_class_order(self) -> None: ...
+    def test_parse(self) -> None: ...
+    def test_subs(self) -> None: ...
+    def test_subs_default(self) -> None: ...
+    def test_normalize(self) -> None: ...
+    def test_get_literals_return_all_literals_in_original_order(self) -> None: ...
+    def test_get_symbols_return_all_symbols_in_original_order(self) -> None: ...
+    def test_literals_return_set_of_unique_literals(self) -> None: ...
+    def test_literals_and_negation(self) -> None: ...
+    def test_symbols_and_negation(self) -> None: ...
+    def test_objects_return_set_of_unique_Symbol_objs(self) -> None: ...
+    def test_normalize_blowup(self) -> None: ...
+
+class BooleanBoolTestCase(unittest.TestCase):
+    def test_bool(self) -> None: ...
+
+class CustomSymbolTestCase(unittest.TestCase):
+    def test_custom_symbol(self) -> None: ...
+
+class CallabilityTestCase(unittest.TestCase):
+    def test_and(self) -> None: ...
+    def test_or(self) -> None: ...
+    def test_not(self) -> None: ...
+    def test_symbol(self) -> None: ...
+    def test_composite(self) -> None: ...
+    def test_negate_A_or_B(self) -> None: ...