Double Jeopardy is a science fiction novel by American writers David Sherman and Dan Cragg; it was released on December 29, 2009.

For years now, human worlds have been raided by a secretive and militarized extraterrestrial society, the Skinks, whose existence has just been made public.

Reports start to come in from the isolated world of Ishtar - mysterious deaths amongst colonists point to an invasion by the alien menace, and the 34th FIST is quickly deployed.

In Ishtar, they find no Skinks - instead, they stumble upon a war amongst illegal human miners and Fuzzies, a never-before seen alien race.

Publishers Weekly classified it as "quality military SF" and praised its realism;[2] the writer Thomas Evans said that it was a "good book within the genre", but criticized the "huge cast of characters".