The Walls Fall Down - Time Tumblers, #1

Being constantly late and always lost is normal, right?Alex is a pretty normal guy, or at least that's what he tells himself. That's what he's been telling himself for years - right until Pia literally crashes into his life. With Pia's arrival comes the truth: Alex isn't normal. He hasn't been for years. Not since he inherited the job of being a Time Tumbler and got tasked with going into history and making sure it doesn't change.
If that wasn't bad enough, Alex and Pia are quickly called upon to put history right, and it's in one of the most infamous battlefields in history: the Trojan War. Armed with quick wits, unswerving nerve (at least in Pia's case), and unlikely legendary allies, it's up to this duo to save their day by bring about the end of another.