This is a perfect book about Asp.Net core. Just useful content, all pitfalls and complex parts are described well. You're missing nothing important because all what you need are there. Moreover, you can start developing new and beautiful Asp.Net core applications right after reading. And it's really cool! The book covers all required topics from basic Asp.Net Core infrastructure to detailed unit tests implementation, being made the way, how you can integrate all of them, is ridiculously simple. It seems to be on the best book from .NET world that I ever read. There are theory, practice, good live examples, very useful links to many blogposts and services and, of course, no water. I think this is just a pearl. Unfortunately, it's a challenge to find a really good book among dozens of useless ones now. And I'm happy that I could do it.
Sure, the book is strongly recommended to everybody interesting in .NET and Asp.Net Core development.