Three San Joaquin County children’s authors, Katie A. Nelson, Margaret Baker-Street and Jennifer Torres Siders, will speak at the final Writers’ Toolbox workshop on Saturday, Sept. 17, at the First Unitarian Church, 2737 Pacific Ave., Stockton. The event is free and open to the public at 11 a.m. It will include a FAQ (frequently asked questions) publication; the mini-book will contain author photos, biographies, and discussion topics. The writers will examine and explore their creations in relation to their subjects and audiences.