This is absolutely huge in the development of the mystery novel. The plot and the characters are well developed. You'll here the detective state fundamentals of detection that have been picked up and used ever since.
The writing is old fashioned, but it's terrific. The narration is adequate. I strongly recommend this to anyone who loves mysteries, especially classic mysteries. I really wish the rest of Anna Katherine Green's work was available on Audible.
I enjoy Shelock Holmes, and appreciate the role AC Doyle had in developing the genre. Not all the mysteries are well developed though. This one is. It's a masterpiece. The narration is outstanding. One of the best audiobooks I've had.
This was more of an adventure story. Not all all the classic deduction driven mystery. For those who love Nero Wolfe and want to hear them all, sure. For those trying Nero Wolfe, it would be better to start with another one.