Hi Alisa,
I’m not familiar with an audio book, but University of Virginia has a podcast on their Health Systems website that is a general overview of ALS and multi-disciplinary care.
http://blog.uvahealth.com/2014/07/29/podcast-tuesday-diagnosing-als-neuromuscular-disorders-audio/
Nancy Wakefield, M.A.
Nancy Wakefield | Director of Patient Services
The ALS Association Greater Sacramento Chapter
(o) 916.979.9265 | (f) 916.979.9271