Use the Library Search to find scores, transcriptions, sheet music collections and fake books.
Tips:
Note: the Library Search designates all kinds of notated music, including full scores, transcriptions, sheet music, and fake books as "score." Note, too, that larger-format scores ("full scores") are shelved in the Oversize collection while smaller formats are shelved along with CDs in the circulating collection.
Fake books contain lead sheets for popular songs, usually printing the melody and chord changes. Originally published without regard to copyright, some fake books now bear the title "real book" to show that their contents are published with permission of the copyright holders.