http://www.amazon.co.uk/Stickerbomb-Studio-Rarekwai/dp/1856695670
I've got this book. I used it on my Fiestas dash and it's pretty good. Only issue is that the stickers are pretty thick and they have white outlines, so you need to cut them and get the hairdrier on them for a good effect.
I went over them with a clear coat of lacquer and it was pretty tidy. Not the best finish but it's cheap and cheerful!
If you go here: http://www.touge.co.uk/stickerbomb-wraps--packs-98-c.asp Touge Automotive sell various raps and also packs of stickers which are better suited to sticker bombing, they're thinner and easier to work with and they dont have big white outlines.
That's probably the better choice but it's also much more expensive.