LA Liber Amicorum is a unique artists' book that binds together 143 works on paper from more than 150 of Los Angeles's leading graffiti and tattoo artists. The individual creative approaches to letter forms, hand styles, symbols, signs, and themes display the city's diverse landscape of graffiti and street art.

The title and the spirit of the book were inspired by a 400-year-old manuscript in the Getty Research Institute's collections: Johann Heinrich Gruber's Liber amicorum ("book of friends"), which was originally bound with blank leaves that multiple contributors then filled with illuminated coats of arms, watercolors, poetry, and calligraphy as mementos for the owner.

LA Liber Amicorum also emulates the black sketchbooks, or piecebooks, that street artists often carry with them and inscribe for each other. The Getty Black Book, as it is also known, gathers their work into a single book, symbolizing the transformation of the creative output by rival crews of street artists into an LA Book of Friends.