I would recommend thowing away the book it comes with and getting the John Palmer book
I have the complete joy of homebrewing by Papazian. It's pretty good.
Yeah i have a few extras i want to buy after i get the kit. Such as:
Auto-siphon, stock pot, Large stirring spoon, bottle washer, bottles, caps, carboy brush, and of course my malt extracts and yeasts.
But in the papazian book, i've been reading the beginner's brewing section, for brewing your first batch of beer. I've read it a couple times so i can get familiar with the terminology, process, and equipment.