Stiff Upper Lip, AC/DC's 15th studio album, may not reach the heights of Back in Black or Highway to Hell, but it delivers strongly and satisfyingly. It's the record that the highly-touted, Rick Rubin-produced Ballbreaker should have been: a simple, addictive, hard album, bursting with bold riffs and bolstered by a crunching, thrillingly visceral sound. Sure, there are absolutely no new ideas, but that's the point. AC/DC knows their strengths and they embrace them. And why shouldn't they? Nobody writes a better riff than the Young brothers; each song has a riff so catchy, it feels like you've heard it for years. Is there anything earth-shaking? Hardly, but it's largely terrific nonetheless, just because AC/DC are so good at what they do. It's simple music, to be sure, but it's unassumingly musical and, in a way rather smart. If making music like this was really that easy, why can't anybody else do it this well? Some bands are capable of knocking out one record like this -- one, maybe two. AC/DC does it nearly every time out. They've never really stretched, yet that's why they have one of the most reliable catalogs in rock & roll. When you put on one of their records, you know what you're in for, and they always deliver. With Stiff Upper Lip, they're not at classic status, but they're still top-notch. This may not be the first AC/DC record for a collection, but once you're into their scene, it's a fine place to be.