I've just started using this one myself, and so far, it's proven to be an invaluable reference. I used to think JavaScript was a difficult and laborious language to learn, especially since the only coding I know is HTML, a little BASIC and some MUSH code (I'm not a programmer, can you tell? *grin*) After paging through the first few chapters of this book, and even jumping around a bit, it's not so much of a mystery anymore, and I now have a correct perception of this popular scripting language, as well as a decent working knowledge. Following the excellent path forged by other titles in the series, this guide is written in a candid, easy to understand manner. Best of all, just like the VQS Guide to HTML4, another of my favorites recommended elsewhere on this site, it's got a companion web site with all of the samples as well as further exercises. Don't waste your time reading thick books full of information you'll never use. Try this one and get to work writing JavaScript immediately. Once you get started and become better versed in the language, you'll want to keep the book nearby as an easy to use reference source.