- 100 numerical games
- Sherlock Holmes Puzzles: Math & Logic Games: Over 100 Challenging Cross-Fitness Brain Exercises
- Solving Sherlock Holmes Volume II: Puzzle Your Way Through the Tales
- Solving Sherlock Holmes: Puzzle Your Way Through the Cases
- Sherlock Holmes Puzzles: Code Breakers: Over 100 Challenging Cross-Fitness Brain Exercises
- L.B. Lang
- Jonathan Black
- Charles Downing
- D. Eca Greenfield
- Raul D'Eça
- Eliza Finkelstein
- Heinrich Hemme
- Michael Moffitt
- Brian Cotnoir
- James Norman
- Frank Moore Cross
- Vesta Sarkhosh Curtis
- Liu Baifang
- Fred Gladstone Skinner
- Dawne Kovan
- R.N.L. Absalom
- Matthias Schwoerer
- Michael L. Moffitt
- Fernando F. Segovia
- Howard M. Erichson