A memoir read by its own author is a different object from one handed to a professional. I Am Ozzy comes with Ozzy Osbourne’s own voice attached, and that changes the terms entirely: the timing, the asides, the moments where the telling is funnier than the events had any right to be.
It explains why the comedy and humour shelf sits beside biography here. The register is confessional, unsparing and very funny, often within the same paragraph. Last Rites, filed with arts and entertainment, carries the later account and is read instead by Ian Danter.