Dr. Gareth Moore 
Pyramid Puzzles [PDF ebook] 

A freak sandstorm seals you inside a pyramid in the desert! The only way out is by solving puzzles that lead you past a snake pit, booby traps, and a treasure cave. Devised by an expert on brain training, these mental gymnastics will help you outsmart the tomb’s ancient curse! You can’t skip a puzzle, but there are hints to help and full answers to help you on your way.