Rating: 

I have been programming in Java for nearly six years, three of which has been with Servlets and JSP. Serlvets have been well documented, but I mostly learned JSP from source code examples and reading the JSP specification. This book is helping me to tie up loose ends and understand the technology better. For that alone, I love this book.

This isn't a "Learn XYZ in 21 days" kind of book. Plan to sweat and grunt a little to grasp the more complex topics, but I'm confident that it is the best JSP book on the market. I'll put it this way, it is the first JSP book I have purchased, and I have passed up other texts for several years that didn't seem thorough. Get this book if you plan to learn JSP.