Audiobooks are single-voiced readings of the novels (or two voices in the case of Master and God). I only license them as unabridged (complete) versions. Various actors read the different books. People ask what choice I have in the reader: sometimes I am consulted but I don’t really have much choice. The books have to be recorded at the right time to coincide with publication of the printed edition.
In the USA my audio titles have been comprehensively reviewed and a new contract arranged with Blackstone (June 2015). This should see all the current gaps refilled, though some of the older or missing books may need to be re-recorded so please be patient.