It's AWP, which is always a place for Trump Sonnets.
How to Buy Trump Sonnets
Small Press Distribution carries both Volume 1 and Volume 2 (and now stocks Volume 3). You can order directly from them, or any good indie bookstore can order them on your behalf. You can also buy books directly from Ken Waldman at an event (and he'll be happy to sign them). He'll also sell books the old-fashioned way via postal mail. He takes cash and checks only ( he really is old-fashioned and is easy to reach).