(AP) — An southern Wisconsin elementary school cancelled a planned reading of a children's book about a transgender girl after a group threatened to sue. Last week, the principal of Mount Horeb Primary Center sent a letter to parents saying the book would be read and discussed because the school has a student who identifies as a girl but was born with male anatomy. The school district was closed Friday, and emails to the superintendent, elementary school principal and others were not immediately returned to The Associated Press.