All of these are also available as Audible books. Well read by Robert Petkoff. I won't pay $8-$12 for eBook versions, but I'll definitely pay one Audible credit for an audio book version, even though they're fairly short.
I've listened to the first two in the series: The Deep Blue Goodbye, and Nightmare in Pink. McGee is still McGee, and the books have, mostly, stood the test of time. His attitudes towards women are a product of when they were written, but even I am able to get past most of that.