Im about to start (again) wood-shedding my shredding. I usually play blues rock which (in my mind at least) is different. Im using a book called "Speed mechanics for lead guitar" and you can find it here:

http://www.amazon.com/exec/obidos/tg/detail/-/0793509629/qid=1110033296/sr=8-1/ref=sr_8_xs_ap_i1_xgl14/104-5493042-0371925?v=glance&s=books&n=507846

I will let you know how I get on !!

Schmange and thejonzter are good instructors to check out here at GT.