Best books and exercises for tapping(on electric guitar)

[peimk]

I've played all the tapping exercises in the both volumes of Heavy metal lead guitar by Troy Stetina ,I need some exercises to improve it.

[gersdal]

Have you checked out Eric V's tapping article? You'll find it here:
http://www.ibreathemusic.com/article/185

I would also recommend learing the solos of Eddie Van Halen (Spanish fly, Eruption, Jump, Beat It, etc etc) and other good tappers to get it into context.

Cheers
gerhard