Hal Leonard.
The world's largest sheet music publisher. Beyond distributing 60+ heritage imprints, Hal Leonard publishes its own catalogue — the Hal Leonard Guitar Method, Essential Elements band and string method, the Real Book jazz fakebook series, Show Choir, sacred, popular folios, and the Hal Leonard educational tradition since 1947.
The Hal Leonard Guitar Method has trained more guitarists than any other single book in print. Essential Elements is the most-adopted band and string method in American schools. The Real Book — the most-photocopied jazz fakebook in history — was officially published by Hal Leonard with proper licensing in 2004. The Show Choir, sacred and popular folio catalogues serve school, church and theatre directors at every level.
Below: the Hal Leonard house departmental catalogue — what Hal Leonard themselves publish, separate from the heritage imprints they distribute. Method-first for the instrumental and vocal series, then format for the popular and theatre folios.