Introduction to Information Retrieval by Christopher Manning, Prabhakar Raghavan, and Hinrich Schütze, Cambridge University Press. (I strongly encourage you to own a copy of this book. A high-quality preprint of the book is available from the book website)
Information Retrieval : Advanced Topics and Techniques by Omar Alonso and Ricardo Baeza-Yates (eds), 2025.
Modern Information Retrieval : The Concepts and Technology behind Search by Ricardo Baeza-Yates and Ribeiro-Neto, 2010.
Search Engines: Information Retrieval in Practice by Croft, Metzler and Strohman, 2010.
Information Retrieval – Implementing and Evaluating Search Engines by Büttcher, Clarke and Cormack, MIT Press, 2010.