During the last quarter of the 20th century, and thanks largely to Eric Clapton's remarkable devotion to his memory, Robert Leroy Johnson posthumously became the most celebrated Delta blues musician of the pre-WWII era. Among numerous editions of his complete works and various anthologies that combine his recordings with those of his contemporaries and followers, J.S.P.'s The Road to Robert Johnson and Beyond combines many of his essential performances with those by dozens of other blues artists from Blind Lemon Jefferson and Henry Thomas to Muddy Waters and Elmore James. 105 tracks fill four CDs with several decades' worth of strongly steeped blues that trace the African American migration from the deep south on up into Chicago. This is a fine way to savor the recorded evidence, as primary examples from Blind Blake, Charley Patton, Son House, Charlie McCoy, Walter Vincson, Skip James, Ma Rainey, Tampa Red, Kokomo Arnold, Scrapper Blackwell, Leroy Carr, Lonnie Johnson, and Peetie Wheatstraw lead directly to early modern masters like Big Joe Williams, Sonny Boy Williamson, Big Bill Broonzy, Johnny Temple, Leroy Foster, Johnny Shines, Homesick James Williamson, Robert Jr. Lockwood, Snooky Pryor, Little Walter, and David Honeyboy Edwards, among many others. This collection would be greatly enhanced by Edward Komara's The Road to Robert Johnson: The Genesis and Evolution of Blues in the Delta from the Late 1800s Through 1938, a highly regarded work of musicological scholarship published at the same time as J.S.P. released their similarly titled box set in 2007. Careful remastering and affordable pricing make this hefty stash of classic blues an excellent option for anyone who cares at all about where the music came from and how it evolved.