Vespers Rising is a part of The 39 Clues franchise, which includes the 39 Clues books, card packs, and interactive online games. The book is a transition between the first series, The 39 Clues, and the second, Cahills vs. Vespers. It was written by Rick Riordan, Peter Lerangis, Gordon Korman, and Jude Watson. The book was released on April 5, 2011. Unlike the other 10 books, the title card shows a series of dots rather than a globe.

Richard Russell Riordan Jr. is an American author, best known for writing the Percy Jackson & the Olympians series. Riordan's books have been translated into forty-two languages and sold more than thirty million copies in the United States. 20th Century Fox adapted the first two books of his Percy Jackson series as part of a series of films in which Riordan was not involved. Riordan currently serves as a co-creator and executive producer on the television series adaption of the book series that was released on Disney+ in 2023. Riordan's books have also spawned other related media, such as graphic novels and short story collections.