Indexing and selecting data, The pandas development team, 2024 - The official and most comprehensive guide to data indexing and selection methods in Pandas, detailing best practices and advanced techniques.
Python for Data Analysis: Data Wrangling with Pandas, NumPy, and IPython, Wes McKinney, 2022 (O'Reilly Media) - Written by the creator of the Pandas library, this book offers a deep dive into data manipulation, including essential indexing techniques and the rationale behind their design.