The autograph is the premise for a dream: maybe, just maybe, the autograph hunter will become the autograph hunted, maybe the autograph will double as a magical transfer of renown, and by receiving the signature, one day you will be signing your name when someone asks. So surmises Josh Kun in the pages of "The Autograph Book of L.A.," the third in his trilogy of books sponsored by the Library Foundation of Los Angeles and based on the Special Collections of the Los Angeles Public Library. But leave it to MacArthur Fellow and culture communicator par excellence Kun to take the concept of "autographs" beyond the mere signing of names in little forget-me-not books. He looks at Los Angeles, his hometown, and sees the stamp of other people who also call it home. Suddenly imagery, graffiti, and, yes, "hand-written names" become the signature of a new Los Angeles, far beyond the one envisioned by Charles Lummis, the city librarian who created the LAPL autograph collection in 1906.