Joe Davis: How I Play Snooker First Published: Roughly 1947 (with various reprints in the 50s and 60s). Author: Joe Davis (The "Emperor" of Snooker).
Moving beyond single pots to planning three shots ahead.
Davis was a master of billiards, which requires high-level safety play.
Check archive.org for scanned public domain or library versions.
If you manage to get the PDF, you might notice the diagrams look dated. Here is how the advice holds up in the era of power stun and aggressive safety play.
Bottom line: A valuable, classic primer that delivers solid, practical snooker instruction—best used alongside modern resources for up-to-date techniques and higher-level training.