They're having a great sale at Audible until Sept 20, with books less than $5! Scanning the list, it's surprising how many of them are favorites of mine.
Soulless by Gail Carriger is the first in a steampunk series with vampires and werewolves. Emily Grey's reading lends just the right touch of Victorian ennui.
Kitty in the Midnight Hour by Carry Vaughn is the first in a present-day series with Kitty as a late-night talk show dj fielding calls from newly outed supernaturals. Marquerite Gavin's reading is a lot of fun.
Outlander by Diana Gabaldon. The classic time travel love story of Claire and Jamie smoothly read by Davina Porter.