@P E Dant,
Depends on the book's subject and/or author. If it's an author I really love? Probably buy it on audible.com. Then again, I've been getting a fair share of audiobooks from the Libby library app via the Brooklyn Public Library.
Stoker's Count Dracula, Nosferatu, Count Chocula, Lestat de Lioncourt, or Hotel Transylvania's Dracula?