Mariner Books, originally an imprint of HMH Books, was established in 1997 as a publisher of fiction, non-fiction, and poetry in trade paperback. Mariner is also the publisher of the Harvest backlist, formerly published by Harcourt Brace/Harcourt Brace Jovanovich. HarperCollins bought HMH in May 2021 for US$349 million. As of fall 2021, Mariner Books was listed as an imprint of HarperCollins. Source: Wikipedia (en)