A school district in Florida is reviewing I Am Billie Jean King, a children’s biography of the out tennis legend, after a parent filed a complaint objecting to its LGBTQ+ content.

In her formal complaint, filed on April 25 to Leon County Schools, Katie Leon — a parent of a child who attended Hawks Rise Elementary School in Tallahassee, Florida — wrote that she objects “to material that discusses being gay and what it means to be gay” and that she did not think the material was “suitable for elementary students.”