How does it make you feel when someone mentions I Spy books? They were introduced in 1992, and there’s a good chance that either you or your kids read them. But did you know how all those images in the books were created? In this video, Insider introduces Walter Wick, the photographer and photo illustrator behind I Spy books. He will take you behind the scenes and tell you just what it took to create photos for the books you (or your little ones) loved so much.