“A spy needs to keep his secrets safe from prying eyes! Use the invisible ink pen to write them down in this awesome and endlessly engaging activity book. Learn code languages, take fingerprints, answer questions all about your spy life, and take fun quizzes. The only way to read your secrets is by using the UV flashlight on the pen cap – without it, the pages of your notebook will appear blank, leaving all uninvited readers and snoopers none the wiser. Your secrets are still safe and top secret!