Mission Pleistocene. Cyborg Squad, #2

Cyborg Squad has recruited new members, just in time to investigate an anomaly that's not behaving the way the first one did. Bravo One, located in Northern Canada and one of the earliest portals discovered, is showing a terrifying and threatening new feature-it's already bigger than Clem's anomaly and it's growing larger by the day. Only one solution: Cyborg Squad has to go through the orb into the past and blow the portal up before it's too late. But when one of Clem's team disappears on the new assignment and a superior officer arrives to take over from Captain Pinkerton-Smythe at exactly the wrong time, Clem finds things moving just a little too fast to suit her.
Not to mention, she and her team discover Bravo One has a number of dangerous new surprises in store for them.