A coalition of booksellers and book industry advocacy groups filed a federal lawsuit this week seeking to strike down a controversial new Texas law. Among the law’s provisions is one mandating “library material vendors,” including booksellers and publishers, to create and implement a rating system for books sold into Texas schools and school libraries based on the book’s “sexual” content. The 28-page complaint claims that the law—which is set to take effect on September 1—would impose sweeping, vague, and unconstitutional content-based restrictions on readers and unduly burden booksellers.