I dont think GK would care. you're buying his book. and it wouldnt be practical for you to buy 2 of them for yourself :P
the growers bible is good, I also bough one called newschool indoor
marijuana growing or somthing like that. with thoes 3 books you should be bussy for quite a bit. theres a bunch of other good books I have. but thoes are the 3 best. GK also has some videos out, I got one of thoes and its great! I like watching videos :P I just need the other 2 DVDs... or is it 3?