Open Book Publishers' Lucy Barnes and Rupert Gatti, in a [remarkable post](https://blogs.openbookpublishers.com/the-cost-of-open-access-books-a-publisher-writes/#costs) detailing their book-publishing costs:
> [M]any of the conversations about the financial viability of Open Access book publishing are predicated on a single business model—that of the BPC [book publishing charge]—and they assume there will be no revenue when a book is published OA.
Like the other [scholar-led presses](https://scholarled.org), Open Book Publishers doesn't charge BPCs—so they push back against the (understandable) fretting around the steep fees:
> [I]f a BPC model cannot support Open Access for books in a fair and sustainable way, it isn’t Open Access that should be thrown out—it’s the BPC model.
Also interesting: Their bottom-line total costs are [around $7,000](https://blogs.openbookpublishers.com/the-cost-of-open-access-books-a-publisher-writes#costs)—a fraction of the [$30,000 to $50,000](https://doi.org/10.18665/sr.276785) Ithaka S+R found in its 2016 study of university press costs.