501 Essential Backgammon Problems, by Bill Robertie
In this book, Robertie analyzes problems in each point of the game, since opening rolls until the bear off. The hints are clear. And as you read the topics, you will feel immediately a good development in your game.

100 Backgammon Puzzles: A Champion's Guide to Testing Your Skills and Improving Your Game, by Paul Lamford
This book contains fascinating and challenging backgammon puzzles that can be enjoyed without ever setting up a board. It presents decisions on checker plays, and on doubling and accepting offered cubes.

Backgammon a la carte - Books & Publications
Backgammon Books & Publications (Magriel, Robertie, Ortega, Kleinman, Woolsey) from Backgammon a la carte.