This is the definitive book by Raymond Smullyan, available for borrowing on the Internet Archive .
A PDF focusing on chess training and analytical methods. Download Sherlock chess pdf
Search for "Smullyan Chess Mysteries" to borrow or download. This is the definitive book by Raymond Smullyan,
A specific PDF exploring a "curious case of the chess bomb". How to find these PDFs: available for direct download.
A collection of further adventures in retrograde analysis, available for direct download.