I discovered that there were 17 of these solo Django Reinhardt pieces. At first I learned the tunes by ear, jotting down notes about how to play them.
In the 1930s, the Belgian-born guitarist Django Reinhardt and his violin partner Stéphane Grappelli created a new kind of small but mighty chamber music. Jazz Manouche or Gypsy jazz, as it came to be known, in an acoustic all-string ensemble of lead guitar, violin, string bass, and not one but two rhythm guitars. Here's a mix of articles, lessons, and product reviews on this unforgettable, irresistible style. This overview by Paul Mehling and Tommy Davy is a great place to start.