Regan Fitz and Elliot Mason have been enemies since they started training to become Glitchers—people who travel through time to preserve important historical events. But everything changes when they find a letter from Regan’s future self, warning them about an impending disaster that threatens them and everyone they know.
Will they be able to set aside their past in order to save the future?
The best part of any time travel book is the different eras in which the characters land, and Regan and Eliot get to visit several different time periods. There is also the ever popular trope of saving the world from disaster, and this addresses this nicely as well.
The most important thing for a time travel book, for me, is to establish a reasonable vehicle for time travel without over explaining it. This does that perfectly. Not only that, but the travelers are given a mission, and are fighting against evil. It is also notable that the faculty don't time travel any more; it's just children. The simulations are interesting and bring up various points of history, like the Triangle Shirtwaist Factory Fire of 1911, which is my favorite horrible historical event. (We all have one, right?) Fans of this author's fantastic Hoax for Hire will find this a good choice.
I would make an excellent Glitcher-- I would totally have called the inconsistency in 1970s hairstyles. I would, of course, need an Elliot who was better than I am at dates.