Rick Riordan, Peter Lerangis, Gordan Korman, Jude Watson
Personally, since I’ve read the 10 other books that come before it, I think that this book’s information should come in other parts of the series, but I’m not one of the four authors who wrote this book. The 39 Clues: Vespers Rising is the first book I’ve ever read that has four authors.
I think this book is for anyone who likes The 39 Clues and thinks that they’re willing to read the series from The 39 Clues: Maze of Bones, to the end of the new series that’s still in progress.
-Wolf