The Infinity Ring is a series of young adult science fiction adventure novels written by multiple authors, including James Dashner, Lisa McMann, Matt de la Peña, Matthew J. Kirby, and Jennifer A. Nielsen, in a similar fashion to The 39 Clues. It is focused on the adventures of Dak Smyth, Sera Froste, and Riq Jones as they try to fix changes in time through time travel. Source: Wikipedia (en)