The Real Book (various editions)

The Real Book is a collection of jazz sheet music that compiles lead sheets—musicians' charts with melody and chord symbols—used widely by performers and students. Originally created in the 1950s by anonymous musicians, it became an informal standard for jazz improvisation and learning. Multiple editions exist, offering a vast library of tunes ranging from classic standards to modern compositions. While not officially published or copyrighted in its early versions, it remains a key resource for jazz education and jam sessions, helping musicians quickly access and interpret essential jazz repertoire.