One of my readers, Shobhit, asked this question on my blog post about must-read advanced Java books: is the book "Java Concurrency in Practice" still relevant? I really liked the question and thought many Java programmers might have similar thoughts whenever someone recommends this popular Java read.
When this book was first published in 2006, the Java world was still not sure of about new concurrency changes made in Java 1.5. I think this was the first big attempt to improve Java's built-in support for multi-threading and concurrency.