They're hiding in plain sight — in invisible ink! Appearances can be deceiving. . . and dangerous! Reveal the hidden mysteries in this chilling Goosebumps activity book, with invisible ink. The pages are jam-packed with mysterious messages, spooky secret codes, terrifying trivia, and games inspired by classic Goosebumps characters, icons, and places, including Slappy, the Haunted Mask, HorrorLand, and many more! Shine the included UV light to find hints and clues along the way as you solve puzzles, and use the invisible ink pen to doodle and write in the blanks. Equal parts scary and silly, this book will have readers shrieking with both fear and delight!