I love a good book, or now days a good audio book. I've always had a commute of 30+ minutes and am obsessed with listening to podcasts and audio books while commuting. Usually my audio books are guilty pleasures or something like Girl Wash Your Face by Rachel Hollis - something that leaves me empowered and thought provoked as I go into the school day or come back home. I highly encourage you to invest in an Audible account. It's been a game changer for me!
These books are everything from self-help to guilty pleasure to coloring books! I've read several of these (or listened to them on Audible).
These books are all directly related to some element of the craft of teaching. Some I've read myself, several I've got on my wishlist for my Audible account.