I read From Monolith to Microservices: A Practical Migration Guide to Evolve Monoliths.
The book discusses approaches to migrating from monoliths to microservices.
The fourth chapter, which takes up the most pages, focuses on splitting databases, which is considered the biggest hurdle to achieving microservices. If you're short on time and just want a quick overview, be sure to check out this chapter.
As the title suggests, this book is specialized in approaches, so if you want to delve deeper into microservices, I recommend Microservices Architecture, written by the same author.
The book is written with the perspective that microservices are not necessarily the optimal solution, allowing readers to think about microservices from a more detached standpoint.