Also, I wanted to mention that if you buy e-books at Amazon, you can add Whispersync for Voice. Basically, you can switch back and forth between reading the e-book and listening to the audiobook. Usually, if you get the e-book at Amazon, you can get the Whispersync audiobook for about $4 or so. To see what I mean, check out the Amazon page for The Spider, Elemental Assassin #10.
Hope that everyone enjoys the audiobook. Happy listening!