Experienced genealogists from the Pima County Genealogy Society show how to start a family tree 6 to 7:30 p.m., Wednesday, Oct. 10, at the Valencia Branch Library, 202 W. Valencia Road; 1 p.m., Saturday, Oct. 13, at Wheeler Taft Abbett Sr. Branch Library, 7800 N. Schisler Drive; and 3 to 5 p.m., Sunday, Oct. 14, at the Himmel Park Branch Library, 1035 N. Treat Ave.; free. Bring a pen or pencil and any information about your family.