Into the Breach - Gateway to the Galaxy, #1

A sharp Marine veteran. A portal across the galaxy. To survive, he'll need weapons. A lot of weapons. Frank Wolfe loves his life of fast women and an explosive arsenal. Each deal the former Marine reps for a billion-dollar arms contractor is bigger than the last, and his latest payday may finally erase his humble beginnings forever. But when a military unit triggers an alien device that opens a starry gateway, Wolfe finds himself in a whole new galaxy.
Before Wolfe has a chance to handle the shock, he and the team must battle creatures both fantastical and nightmarish. After barely surviving their first close encounter, the sales rep's quick wits get him an audience with an otherworldly princess. Now if only his motormouth could find some way to take down a raging sea monster. With a shot at love and a chance to be a hero, will Wolfe's first heartfelt guardian mission also be his last?