What are the top UX books for mobile app designers?

The UX of Mobile Apps by Theresa Neil
The Mobile Frontier: A Guide for Designing Mobile Experiences by Rachel Hinman
Designing for Touch: Principles and Practices for Touchscreen Interaction by Dan Saffer
Hooked: How to Build Habit-Forming Products by Nir Eyal
Some other great UX books for mobile app designers include Mobile Usability by Jakob Nielsen and Raluca Budiu, and Don't Make Me Think by Steve Krug.

CRO & UX are a big field, it can be difficult to know where to start 🤔

Most of the guides out there are either too long, too short, or generalize things so much that they do not help you at all.