I couldnt tell you from personal experiance. I dont have either. But this question has been asked before on this board ,and most people say that Anabolics2002 is the best book ever on AAS. And that Jeff Summers (author of Steroids 101) is an apsolute jackass. I dont know about his book ,but I know is newsletter isnt worth wipin your ass with. Hope this helps. Oh yeah ,these boards are the best place for up to date info on AAS in my opinion. Remember the search button is your friend.