Overall, a pleasant read, information is neatly presented, together with diagrams and good explanations.
Unfortunately, this book is already outdated, as the Security Oauth2 Authorization is deprecated and is no longer maintained, being replaced with Spring's Authorization Server. This was the reason to buy this book, as the Oauth2 flow is a bit more complicated and the author's breakdown is welcomed. The new implementation is pretty dissimilar, so only the basic principles from the author's book helped me in this regard.
Otherwise, I'd say that except for the explanations of the Spring Security Filter Chain and a few other points, the information presented is pretty trivial and can be easily accessed via Spring Security docs / youtube official channel.
Recommend only if you prefer the structured aspect of a book, but again, I would pay attention to the deprecated Auth server implementation.
A good book to read for Spring Security. There is a new edition of this book, and the codes presented in this book are deprecated, but the information provided in the book is very relevant. This book presents the architecture of Spring Security, including Authentication Filters, AuthenticationManager, AuthenticationProvider, AuthenticationToken, and many more concepts in an understandable way. Before reading the book, I got confused whenever I needed to look at any Spring Security configuration or create one. But now, I am confident enough to handle any Spring Security requirements. If you also need to understand Spring Security and apply it precisely, then I highly recommend that you read the latest edition of this book.
Read very very quickly and not thoroughly, just to get knowledge. So can't evaluate it, but in general, I found a couple of useful ideas. So, maybe will reread it in the future when needed
Excellent text on Spring Security, the 2nd Edition release in Feb 24 covers Spring Security 6 along with Auth and Resource Server implementation. Easy to digest and covers in good details.