A Little Giant® Book: Optical Illusions By (author): "Keith Kay"Genres:Puzzles books ISBN1402749716ISBN139781402749711AsinA Little Giant® Book: Optical IllusionsOriginal titleA Little Giant Book: Optical IllusionsThis is a volume of over 300 optical illusions. It will put you to the test to see if you can believe your own eyes. What you see is not what you get.