Just 54 Black-owned bookstores were identified across the U.S a decade ago. Today, a new report counts 306.Why it matters: As public schools and libraries remove books by Black authors — from Beloved to The 1619 Project — Black-owned bookstores are increasingly serving as places where readers can access contested titles and authors’ full bodies of work — and gather in community to discuss them.The big picture: Though the first State of the Black Bookstore report documented growth…