AC/DC at the note level is surprisingly more complicated than it seems. they use a lot of unusual voicings, and Malcom and Angus are often playing slightly different things. it's easy to get close to what they're playing but often hard to get the voicings exactly right -- like Mailman1971 says. and those voicings are part of their unique sound -- x355xx doesn't sound the same as x3x013.
OP, i've heard that previous AC/DC books didn't get a lot of the subtle bits right, but this one claims that errors have been fixed. i haven't seen it, but i too am interested if anyone has. google turned up this, which looks pretty well done: