A new PEN America report documents how state legislation across the country is driving an alarming spike in book bans in schools.

The report, Banned in the USA: State Laws Supercharge Book Suppression in Schools, expands on two previous PEN America reports tracking the intensifying wave of book bans and laws aimed at limiting access to school and library books. Since July 2021, when PEN America began tracking public school book bans, the organization recorded more than 4,000 bans books through December 2022, including 1,477 individual book bans affecting 874 unique titles during the first half of the 2022-23 school year—a 28% increase over the previous six months.