I think I've read them all, but I wouldn't swear to it. I started with "Musicophilia: Tales of Music and the Brain," which focuses on ear worms, ear ringing, and vivid audio hallucinations in people who are perfectly sane.
He also delves into the phenonenon of "hearing music" in your head, which most people report, but which a small, but that that small, minority of people (like me) cannot do.
Unsuprisingly, I guess, he reports that accomplished musicians and composers have been shown to have this ability at higher rates and measurably stronger levels than the average person.
I love how Sacks tells stories about his patients to illustrate complex subjects and humanize what might otherwise be a fairly dry subject.