Well, that backfired.

Amazon on Thursday announced plans to stop selling all books that frame transgender and other sexual identities as mental illness, a decision it reached after four Republican senators complained to CEO Jeff Bezos last month when the company pulled a single book on the subject from its virtual shelves.

In his response to the senators Thursday, Brian Huseman, Amazon’s vice president for public policy, said the company’s content guidelines are updated regularly, sometimes resulting in the removal of previously approved books.

The company hadn’t intended to single out one book, he explained. Rather, it will be banning the entire category altogether.