[78-L] OT? question about RCA Program Transcription audio books

[Robert M. Bratcher Jr.]

I don't own these discs (wish I did!!) however I wonder if RCA put out any other 
audio books in the program transcription format other than this one? The Bat by 
Mary Robert's Rhinehart & read by James Wallington on ten discs LR-1 through 
LR-10? Or is this the only one that RCA put out in this short lived format. 
Below is the URL for a page which not only has clickable labels for each disc 
side but also 32kb/s mp3 files of each side that can be listened to or 
downloaded as desired. Be aware that the discs have some scratchyness to them 
(they are a bit worn) when you play the sound files....
 
http://98.130.146.204/rca_victor_transcriptions/rca_victor_transcriptions.html
 
If other audio books exist in this format any info would be quite nice!!