Many of the same considerations for scholarly publishing that apply to journals also apply to books, with the following qualifiers that may affect scholarly impact:
You may want to talk to your publisher about their review process, electronic publishing options, marketing plan, indexing arrangements, publication agreement terms (including options for open access or shared copyright), and what statistics they track for their publications.
Keep in mind that publishers are typically more interested in sales numbers and demographics than in "usage" statistics, citations, or scholarly impact metrics.
For more information on how to find scholarly impact metrics for scholarly books, see the "Determine Your Scholarly Impact" section of this guide.
The links below are not a comprehensive list of academic book publishers. In general, you can identify potential publishers by:
Looking at scholarly books in your discipline available at an academic library.
Talking to colleagues in your department or scholarly organizations.
Visiting the publishers or vendors room at your next professional conference.
Looking for "Calls for Proposals" on scholarly organization websites, listservs, or online scholarly community pages.
Academic Book Publishers:
Association of University Presses, "Finding a Publisher": includes a directory of university press members and a subject area grid showing their subject areas of interest.
List of Academic Publishers (wikipedia): includes commercial academic publishers as well as university and non-profit presses.
Publishers of OA Books (Simmons College): a community-curated listing of over 200 Open Access academic book publishers.
Open Book Publishers (UK): one of the major publishers of Open Access scholarly books.
Aquiline Books (UNT Libraries): an imprint of the UNT Libraries designed for works of scholarship, both new and reissued, from the UNT community. All publications from Aquiline Books are freely available to read online, and some are also available in print, as e-books, or both.