There's a free version of Outlander (Diana Gabaldon) at Audible
http://www.audible.com/pd/Romance/Ou...ook/B003TFYOL4
I'm not sure of the difference between the version that's already in my library because they appear to be nearly identical (maybe it's not Whispersync compatible?)?
ETA: How weird. My older version is just a few minutes longer than the new one.