This book is called The Diviners, but weirdly enought, although you do know who they are, they don't really do anything and they never get together! They keep being the separated entities they were before the start of the book.
I feel like this was just an introductory chapter to the rest of the story - even the murders appear not to be really solved - so everything is just presented to you, they tell you that something is going to happen, someday, probably someday soon, but not now. This makes me very interested in reading the second book, but leaves me feeling a bit cheated with the first one.
However, I did enjoy getting to know all these different characters, I loved to know a little more about New York City all those years ago and I'm really looking forward to read the second book, so I'm very glad I picked up this book.