A producer for Apple Records, singer-songwriter Peter Asher, one half of the British Invasion group Peter & Gordon, has worked with artists ranging from James Taylor and Linda Rondstadt to Steve Martin and the Steep Canyon Rangers. Tonight, he comes to the Grog Shop, where he'll perform and share stories from his recent book, Beatles From A to Zed. The show starts at 7, and tickets cost $40. He'll appear again at 7 tomorrow night at the venue too.