Syndicate Wars: First Strike by George S. Mahaffey Jr.

Robert Heinlein meets Guardians of the Galaxy in a time travel romp reminiscent of Groundhog Day on Steroids.

With an alien invasion and survival of the human race at stake, service in the Marines was no longer simply about honor and duty, it was a matter of life and death.

This was especially true for Quinn, a Marine sergeant who was hell-bent on ensuring that her young daughter had a world to grow up in. No one stands a chance, but the invasion isn’t what it seems. The others don’t see this, but one thing separates Quinn from the others:

She’s a certifiable badass.

And as the aliens will learn, it’s tough to keep a good woman down.

“A space opera with heart, great characters, and neverending action, the set-up will suck you in and the characters and story, including a very cool time-travel hook, will keep you wanting more.”