ehhh.. one man's opinion? There is nothing that can be taught in a book that can't be taught via some quick tutorials. At least for Web-Apps, after that its just a matter of practice.
You'll want to look at HTML and CSS (derp)
PHP for Server Side Dynamic Webpages
Javascript for Client Side dynamic Webpages
SQL for database queries, and yes, asp, and ajax, and such will all help you, but the five there are, again, IMO, the biggest/most important things to learn.
There are lots of Tuts in our tutorial section for this sort of thing, tho tbh if you're jumping around from subject tp subject youll probably only need t olook at SQLi and XSS problems :p