Uh-oh. Someone left the door open. Yup: that door. The one that leads to another dimension, where time is all mixed up. And before anyone noticed, a vicious horde of prehistoric critters raced through. Now the biggest, hungriest, scariest monsters that ever existed are living in this book! Oh - and it's your job to catch them! So study the clues, step into a habitat, turn off the lights and get ready for action. You see, these beasts can't hide in the dark. They glow....