Tra Publishing was founded in 2016 in Miami by Swiss-born graphic designer and author Ilona Oppenheim. They have good distribution and in North America their books are widely available in libraries and bookstores.
While they publish excellent children’s books (I first encountered them through the book, The Rare, Tiny Flower by Kitty O’Meara), they do not appear to be open to unsolicited submissions of them.
Instead they ask for proposals about “fine and decorative arts, architecture, and design.” They go on to say, “we place a premium on works that contribute to advancing cultural, social, and environmental awareness. In particular, we are interested in books from artists, architects and architecture firms, designers, museums, galleries, arts organizations, professors, and universities. We seek out books and subject matter that will appeal to both general and professional readers.”
Only submit a proposal to them, if you feel like your book is a good fit based on the above description, and time spent with their catalog, here.
Their submission guidelines are here. Please follow them carefully, if your work is a good fit. They try to respond to all submissions within two months.
Emily Harstone is the author of many popular books, including The Authors Publish Guide to Manuscript Submissions, Submit, Publish, Repeat, and The 2023 Guide to Manuscript Publishers. She regularly teaches three acclaimed courses on writing and publishing at The Writer’s Workshop at Authors Publish. You can follow her on Facebook here.