This is a really excellent book, written for those of us who have responsibility for a website, but don't really feel they know what they should be doing.
It's also a great resource for people like me, because I get to point others to it and make my job (hopefully) easier.
There's a free chapter, so you can hopefully get a flavour of why I'm so enthusiastic about this book. Read it, then buy a copy.
The Website Owners Manual (The Secret of a Successful Website) - book by Paul Boag