"Renegades" by Craig Alanson is the seventh book in
his "Expeditionary Force" series. I must admit I quite liked
it. I've enjoyed all the books in the series than came before it. it's (sort
of) in the same vein as Heinlein's "Starship
Troopers" and Haldane's "The Forever War". It has
believable characters, and the sci-fi element is consistent. The author has
decided exactly how his "Impossible science" works, and he stays
within his self-imposed boundaries. that (for me) is the difference
between good sci-fi and "Harry Potter Magic"
Of all the books I've reviewed so far, this is one of the better ones.