Audio
Here are some works that are available in audio format.
The Shadow Year

The Shadow Year is available, unabridged, from Audible.com
http://www.audible.com/pd/ref=sr_1_8?asin=B004MCFA2U&qid=1361128773&sr=1-8
http://www.audible.com/pd/ref=sr_1_8?asin=B004MCFA2U&qid=1361128773&sr=1-8
The Physiognomy -- The Well-Built City Trilogy, Book 1

The Physiognomy is available, unabridged, from Audible.com
http://www.audible.com/pd/ref=sr_1_9?asin=B004MCF93A&qid=1361129161&sr=1-9
http://www.audible.com/pd/ref=sr_1_9?asin=B004MCF93A&qid=1361129161&sr=1-9
Memoranda -- The Well-Built City Trilogy, Book 2

Memoranda is available, unabridged, from Audible.com
http://www.audible.com/pd/ref=sr_1_11?asin=B004MCF9XA&qid=1361129161&sr=1-11
http://www.audible.com/pd/ref=sr_1_11?asin=B004MCF9XA&qid=1361129161&sr=1-11
The Beyond -- The Well-Built City Trilogy, Book 3

The Beyond is available, unabridged, from Audible.com
http://www.audible.com/pd/ref=sr_1_10?asin=B004MCLBQO&qid=1361129161&sr=1-10
http://www.audible.com/pd/ref=sr_1_10?asin=B004MCLBQO&qid=1361129161&sr=1-10

Ahab's Return; or The Last Voyage is available, unabridged, from Audible.com
www.audible.com/search?keywords=Ahab's%20return&ref=a_home_t1_hdrSrc
www.audible.com/search?keywords=Ahab's%20return&ref=a_home_t1_hdrSrc