I made the mistake of updating my app
I know. I always recommend turning off auto updates to avoid Audible's never ending quest to break the app. My app wasn't correctly playing collections, so I thought I would try updating it and not only did it not fix the collections, but it removed the ability to long tap and go straight to my library.
I swear Audible's engineering department is The Bad Place, designing a special hell for audiobook lovers everywhere!