What Was the First Rock 'n' Roll Record?

Using the essentially rhetorical (some might say theological) question: "What was the first rock 'n' roll record?" as its starting point, this unique book nominates 50 records for the honor, beginning with an early live recording, "Blues, Part 2" (1944) and ending with Elvis Presley's "Heartbreak Hotel" (1956). Forewords by Billy Vera and Dave Marsh.