I loved this book! I'm actually really confused as to how some other reviewers could say it fell flat somewhere in the middle/end. I loved every part of this book even down to the spoiled, wealthy protag. It was a unique and interesting concept though I find it difficult to describe without some spoilers. Here's my effort: 
 Spoiled kid from Florida has a close relationship with his grandfather. His grandfather told him stories when he was younger about the home he lived at with extraordinary kids. He even showed him pictures. Kid thought it was all fairytales but grandfather maintained them as truth until his dying last words (despite everyone else attributing it to dementia or old age). Kid sees some truth in the moments in which his grandfather dies. During his severely depressed grieving period, he decides to see if he can find the truth about his grandfather by journeying to this home on an island in the UK. What he finds is more that he could have expected.... 
 The book is full of pictures like the ones the grandfather shows his grandson while telling his stories. Really put a little something extra in the book. 
 I'm really excited that this is going to be a series. I've been kind of hesitant to accept this whole trend of turning everything into a series, but this one is perfect for it.