The Tactics Ladder Beginner I: 500 Chess Puzzles, 600 Rating level, 2nd edition: 1

The Tactics Ladder Beginner III: 500 Chess Puzzles, 1000 Rating Level, 2nd Edition: 3

The Tactics Ladder Intermediate I: 500 Chess Puzzles, 1200 Rating Level, 2nd Edition: 4

The Tactics Ladder Intermediate II: 500 Chess Puzzles, 1400 Rating Level, 2nd Edition

The Tactics Ladder Master: 500 Chess Puzzles, 2400 Rating Level, 2nd Edition: 10