Dash & Lily's book of dares

I really liked this book. It's about a girl named Lily, whose parents left her with her brother while they are in Fiji. Dash is a boy with parents who have divorced, and just broke up with his girlfriend Sofia. While strolling through the bookstore one day, Dash find a mysterious red moleskin journal. Inside is a list of dares leading to the mysterious girl who wrote it. Will they ever meet?