Amish expert to speak Saturday at Ada Library Posted on November 10, 2015 0 ADA — Amish expert and author Brenda Nixon will be featured Saturday at 10:30 a.m. at the Ada Public Library. Nixon will be speaking on the Amish culture and signing copies of her book, Beyond Buggies and Bonnets: Seven True Stories of Former Amish. The event is free and open to the public.