This was a work related book, not very long, not too out of date and not all that interesting in the end. There are lots to learn in this book, even for the experienced Java developer, but as that is just a very minor part of what I do for work and not all that practical at the moment. I would recommend this more like a reference book for developers, to read once and refer back to later when you need to code and write tests.

As a side note I read this book on my phone, with a small screen and in EPUB format. The normal text was readable but the code sections given as examples was quite unreadable and difficult to make sense of. You would hope that the EPUB format and layout would improve to better handle code samples and images. But I used what I had available.