The link below takes you to the Radio Archives ebook catalog page. They're offering "The Spider #11" free (and DRM free) in both epub and Kindle formats.
This volume includes:
* The Full-Length Feature Novel "Prince of the Red Looters" by Norvell W. Page writing as Grant Stockbridge
* "Doc Turner Visits A Slaughter House" — A Doc Turner Story by Arthur Leo Zagat
* "Dynamite and Stone" — A Short Story by Winston Bouvé
* and a column "The Web" — A Department by Inspector Leslie T. White
How can we aid the Spider’s fight against crime?
http://www.radioarchives.com/SearchResults.asp?Cat=128
I have found the Radio Archives books to be very well constructed.
As their name implies, Radio Archives also sells audiobooks, and I think they have a few samples of those also available for free download.
Highly recommended!