Real Book Sheet Music / Score - Download and Print
The name "Real Book" can apply to many compilations of "Lead Sheets" for jazz songs. However, it's most often used when referring to Volume 1 of an underground series of books transcribed and collated by students at Berklee College of Music during the 1970s.
The name derives from a series of fake books which were illegally reproducing chords and lyrics of standards. In what is a surprising move for the music industry, rather than just chase after the illegal publications, they published their own copyrighted edition thus giving fair and reasonable access to a much-needed resource. If only they would provide a license for lyrics in the same way!