premise: Mariner Books, a division of Houghton Mifflin Harcourt, was established in 1997 as a publisher of fiction, non-fiction, and poetry in paperback. Mariner is also the publisher of the Harvest imprint backlist, formerly published by Harcourt Brace/Harcourt Brace Jovanovich.
hypothesis: Mariner Books publishes books for Harcourt Brace/Harcourt Brace Jovanovich.
reason: Mariner Books does not publish books "for" Harcourt Brace/Harcourt Brace Jovanovich. Mariner Books publishes the Harvest imprint backlist that was "formerly published by" Harcourt Brace/Harcourt Brace Jovanovich.