I have a vague recollection of having seen a Thin Man
movie back when I was a kid. So I wanted to read the original. It is pretty good. Basically it seems that the author meticulously copied his style from the character, Guy Noir, from Garrison Keillor (obviously the other way 'round). What I learned from the book is that Asta is a miniature schnauzer (not wirehaired fox terrier as in the movie) and that the "thin man" wasn't a reference to Nick Charles, but to the guy Nick Charles was trying to find, an inventor of some kind.