Java The most interesting Java book in the worldI am sure this book is the most interesting Java book in the world. Because even a skilled developer learns Java with 97 puzzles that knock your knees. By solving the puzzles in this book, you can understand and avoid the dangers and subtle pitfalls that surround the Java language and standard libraries. Of course, puzzles contain content that we can always encounter, so we do not need to emphasize the usefulness. Java version of this book - This book was written in Java 5 in 2005 . However, Java 8 is still available and is still available to developers who want to make better use of Java. I checked the behavior of all the source code of this book in Java 8. Therefore, it is good to understand that the term "in Java 5" used in the text of this book is replaced by "in Java".