First and Only is a military science fiction novel by Dan Abnett, set in the Warhammer 40,000 universe. Published in 1999, it is the first novel in the Gaunt's Ghosts series, which, as of 2019, consists of 16 novels and multiple short stories, as well as two spin-off novels (Titanicus and Double Eagle) and a companion book that acts as a mock history of the military campaign which forms the setting of the series. The work is Abnett's first published novel, and was also the first novel published under Games Workshop's Black Library imprint. Prior to then, Games Workshop published short stories in its magazine Inferno!, and a limited number of novels, including Ian Watson's novel Space Marine and Inquisition War trilogy, under the label "Heretic Tomes." As of 2006, it remained Black Library's best-selling title. Source: Wikipedia (en)