This is the first book in the Century series. The books are written in Italian and translated into English by Leah D Janeczko.
Once every hundred years, the world must be saved by four kids. In this century, four seemingly unrelated kids happen to end up in the same hotel in Rome together.
They are thrown into a mystery of ancient secrets. This is a game of sorts but someone has changed the rules. Someone who wasn't supposed to die was murdered. The stakes are higher but no one is telling the kids anything - they have to figure it out on their own.
This is supposed to be a 5 book series in young adult fiction. This is a pretty entertaining book. I'm planning on reading at least the next book which is Star of Stone. If I still like it, I'll finish the series.