There are a few threads on this sort of topic so I suggest searching for those threads. I can't really give any examples. However, there are some awesome lessons and columns on this website which have helped me a lot.
Theory for the Contemporary Guitarist, and Intell-Shred, as well as Progressive Rock Guitar
My last.fm
Quote by OMMad
i've always found pop to be harder to play than metal... especially shred metal... it's just really fast tremolo picking and the occasional palm mute... and the only chords you have to worry about are power chords...
Quote by MudDuck86
Most Hal Leonard theory books are decent.


Quote by Gunpowder
Thrashturbating? Most metal of all ways to pleasure oneself.
The AB Guide to Music Theory, Part II

ISBN: 9781854724472
Once We Were Anarchists
I'd recommend the Jazz Theory Book by Mark Levine, although you have to be able to read music... but it's well worth the effort and has examples to play so you can hear what the theory is all about.

Wouldn't recommend the AB guide to music theory just as it was mentioned earlier, it's a useful book, but really only if you're serious about playing complex pieces from standard notation, there is theory but other books are far better.