1 pair of 3d glasses attached to acknowledgements page.
Pop-up book.
Pull-the-tab book.
Slide-the-tab book.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Colour illusions : visual tricks, fantastic facts, and impossible puzzles. ISBN 9781409347941. Published by Dorling Kindersley Limited in 2014. Publication and catalogue information, links to buy online and reader comments.
