Optical Illusions winter read the visual clues to

read the visual clues to Leonardo da Vinci's Last Supper

Weaving together material from the royal archives

' Lisa Black

including acid attacks

Optical Illusions winter read the visual clues toLearn how NOT to believe what you see with this book of eye popping pop up visual tricks. From the classic "which dot is bigger?" or "is this line straight?" illusions to the first ever 3D trick to appear in a book, Optical Illusions is packed with picture puzzles. Every illusion is set up to challenge what you think you see. There are hints and tips of how to approach the illusion, and then an explanation of how it works and why you were fooled (and