Sleeping Giants

I received a copy of this book from NetGalley. A little girl named Rose is riding her new bike when she falls into a hole in the woods. She wakes up in a giant hand, the walls around her carved in symbols and glowing. Years later, She is put in charge of a mission to find other pieces belonging to the “giant”. Hoe old is it? Was it built by aliens? I was really excited by the description of this book, but for me, it didn't live up to my expectations. The only character in the book that I actually liked was Rose, beyond that, there was no character connection for me.