Currently Being ModeratedFeb 22, 2013 1:52 PM (in response to Janice Fisher)
On my iPod touch, when the audiobook is playing I tap the screen to display the speed button. The default is 1X, but you can change to 2X or 1/2X with a few taps.
Assume it's the same way on the iPad.
I don't think if there's a similar setting in iTunes, but for 3 bucks, this might do the trick:
SpeedUp Player Pro