Writing another memoir, hiring replacement Wilburys, or actually bothering to show up to collect a Nobel Prize—these are just a few of the ways Bob Dylan could spend his eighth decade on Earth. Instead, he’s undertaken a rather different endeavor, one that on the surface may be as peculiar as any of his most inscrutable artistic gestures in the last half-century or more. But to just about everyone’s surprise, Dylan’s quest to perform and record his own versions of dozens of songs made famous by Frank Sinatra and others has yielded some unexpectedly marvelous music thus far.This week sees the release of Triplicate, the unfeasibly large follow-up to 2015’s Shadows in the Night and 2016’s Fallen Angels. The new three-disc set adds 30 more songs to the Nobel Laureate’s newly expanded repertoire of classics. Though most of them were initially made famous by Ol’ Blue Eyes, all are part of a canon that has become loosely known as the Great American Songbook, and also includes the handiwork of songwriters like Irving Berlin, George Gershwin, Cole Porter, Johnny Mercer, and the team of Richard Rodgers and Lorenz Hart. These songs transcended their own era—one that roughly spans the glory days of Tin Pan Alley in the 1920s to the artistic peak of Broadway musicals in the 1950s—becoming pop and jazz standards for many generations up to and including this one.As tired as these tunes may seem in slavishly retrograde renditions—with Rod Stewart and Michael Bublé being regular offenders, though we must never forget Seth MacFarlane’s big band jazz album—their lyrical wit, melodic sophistication, and sheer malleability mean that they’re forever ripe for reinterpretation and hardy enough to withstand the occasional act of desecration. To mark the arrival of Dylan’s latest venture into the Great American Songbook, we provide a survey of renditions by other artists—Bryan Ferry, Joan Jett, The Roots, and The Bonzo Dog Band, just to name a few—who clearly love this canon, but whose own approaches avoid those easy conventions.