Hexaflexagons, Probability Paradoxes, and the Tower of Hanoi by Martin Gardner
Science Magic Tricks and Puzzles by Martin Gardner
Entertaining Mathematical Puzzles by Martin Gardiner
So far, these books are all very interesting and informative.
Sariel is an incredible lego builder who has made tons of amazing projects using LEGO power functions. His website is: sariel.pl
Martin Gardner is considered the father of recreational mathematics, and has written a variety of different works about mathematical puzzles and games.
