I've only gotten through two short books this year:
Forget the Funnel by Claire Suellentrop and Georgiana Laudi - concise and insightful overview of modern marketing thought, moving beyond MQLs
Pocket Guide to Product Launches by Mary Sheehan - a nice introduction to product launches from a product marketing perspective or a helpful refresher with lots of fresh insights.
I've also been really enjoying the podcast "If Books Could Kill," which questions and fact-checks many poplit "airport books" with a lighthearted vibe.