For almost 30 years now, The Cramps have been recasting schlocky garage and backcombed rockabilly in a post-punk context. This two-disc set combines early demos with rehearsal tapes and two live shows of late-’70s vintage in which the audience show their displeasure: “It’s a shame!” cries one heckler. A caveat on the sleeve reads “Cramps Fiends Only”, and those already inducted into their weird world will find themselves admirably well served here.