Wow!! This book is amazing!! I just finished reading it and I loved it!! It might be a little scary for younger kids, but it is still a GREAT book! :) I love the holographic cover and the illustrations, but the best part was reading the story. It's not often a story has me reading it from beginning to end without pause, but this one did. My favorite part was when Robert sees Professor Gargoyle turn into a monster! I think one of the reasons I liked this story is because it has adventure and fantasy, but is about a seemingly typical 13-year-old boy. I would totally recommend this to any of my friends, girls and boys! Also if you liked Percy Jackson then you will probably love these stories! I can't wait to read the rest of the series!