Title: Puzzle Chest, Author: Ella Harris
Title: The Book of Puzzles and Enigmas, Author: Fabrice Mazza
Title: Nikola Tesla Puzzle Collection, Author: Richard Wolfrik Galland
Title: Greatest Puzzles Ever Solved: 200 enigmas that have challenged mankind, from the dawn of time to the present day, Author: Tim Dedopulos
Title: The Brainpower Bible, Author: Dan Moore