I was looking to purchase some tab books from amazon/ebay. I was wondering how correct these tabs are? Are they band approved tabs, 100% correct, close to 100% or what?
The authentic books are 100% correct. Truly. They sometimes are band approved, but I think they only need to be record company approved.

Guitars: Ibanez SV5470F, Ibanez Xpt700, Fender MIM Standard Stratocaster ('04-'05), Jackson Ps-2
Ashton AG200,
Amps: ENGL E530, Bugera 6262-212,
FX: TC Electronics G-major 2, Behringer EQ700, Morley Volume / Wah
Guitar Recorded Versions are the best though, the others have slight mistakes sometimes.