Sheila Overton, M.D., will present a talk on her book, Before It's Too Late: What Parents Need to Know About Teen Pregnancy and STD Prevention by Overton with Treacy Colbert.This event takes place on Saturday, May 28, at 1 p.m. in Room B, on the second floor of the Juanita E. Thornton/Shepherd Park Library. Overton will have books for purchase, and she will also sign previously purchased copies.