A list I put together a while back: https://www.encona.com/posts/product-manager-resources
Overview books:
* Inspired
* The Product Manager’s Desk Reference
* The Lean Startup
* Agile Product Management with Scrum
Interview preparation (good for breadth, even if you’re not applying for jobs):
* Decode & Conquer
* Cracking the PM interview
Other good books for PMs:
* Hooked
* The Design of Everyday Things
* Zero to One
* Traction