By Lyle Menendez, as told to Norma Novelli, with Mike Walker; edited by trial historian Judith Spreckels and with a conclusion by Pierce O'Donnell. That many people working on the thing and nobody was like, "This exclamation point is maybe a little Teen Beat for a book by a guy who killed his parents"?
Also, how is it "unauthorized"? Is that to get around Son of Sam laws? I don't get this at all.
The dust jacket, in addition to raising about a hundred questions, is not in awesome shape: front and back have folds, as shown; sticker detritus on the front; rubbing and dings to the back. The book itself is fine, a remainder mark on the bottom but otherwise clean and unmarked...which is good, if you end up reading this on public transit and don't want anyone knowing what it is, hee.