Built-in Types (Text Sequence Type - str), Python Software Foundation, 2023 - Provides comprehensive details on Python's string type, its methods, and behavior, serving as the definitive technical reference.
An Informal Introduction to Python (3.1.3. Strings), Python Software Foundation, 2023 (Python Software Foundation) - Offers an accessible introduction to strings within the official Python tutorial, covering basic creation, operations, and indexing with practical examples.
Fluent Python, 2nd Edition: Clear, Concise, and Effective Programming, Luciano Ramalho, 2022 (O'Reilly Media) - Offers a comprehensive and in-depth treatment of Python strings, including advanced topics and best practices beyond basic usage, suitable for those seeking a deeper understanding.