The chaplain's war

"The mantis cyborgs: insectlike, cruel, and determined to wipe humanity from the face of the galaxy, as they've already done with two other sentient species. The Fleet is humanity's last chance: a multi-world, multi-national task force assembled to hold the line against the aliens' overwhelming technology and firepower. Enter Harrison Barlow, who simply wants to serve his people. Only what good is a Chaplain's Assistant in the interstellar battles which will decide the fate of all mankind? More than he thinks. Captured and stranded behind enemy lines, Barlow must embark upon an improbable…