For all but the most dedicated fans (and, if you’re into power pop, chances are you’re at least a little dedicated), the 17-track Retrospective: The Best of the Knack will be all the Knack that you need, but even if your tastes run a little deeper, this will satisfy, and not because it contains collector bait like the demo version of “Rocket o’ Love” and a cover of Springsteen’s “Don’t Look Back,” but because its track selection is smart and infectious. That adds up to a fine collection of one of the great sleazy pleasures of the late ’70s. – Stephen Thomas Erlewine