Chad Eagleton is out now. And in case you missed them, the first series of stories can be found here.
Book description: In his first adventure, Simon Rip pursued Dr. Robert Berlin from the Ice Age to the end of time to retrieve the most powerful invention the world has ever known, the Baryon Core. Now, with his employer's schemes to control all of time revealed, Rip travels across the centuries assembling a team to stop The Company once and for all. With the assistance of Ada Lovelace, Allegra Byron, John Whiteside Parsons, and a mysterious young boy imprisoned in a medieval monastery, the daring time-cop takes the fight directly to The Company. He'll trace the origins of the conspiracy to the darkest heart of World War II, uncover the mastermind, and discover the secrets of his own past.