I don't read much other than the Bible, but I do go through a lot of audiobooks. Agent Zigzag was a great, true spy story. I like Daniel Silva's Gabriel Alon series, Louise Penny's Armand Gamache series, Alex Berenson's John Wells series. All are very different, but the writing is a step up from Baldacci, Patterson, Clancy & Co., etc, and about three steps up from Cussler (who I still occasionally like to listen to.) Our library has audio books available for 10-day download on two apps - Overdrive and One-click Digital. The don't have nearly the selection of Audible, but they're free vs $15/month.