What a delight to discover a 'new' Jane Austen novel!
Lady Susan is an epistolary novel, and Jane's first work. It's funny and naughty and about as far from Mansfield Park as I could imagine. Lady Susan, the wretchedly amoral titular corespondent, pulls everyone she meets into a chaotic whirlpool in the best and most recognizable tradition of drama queens throughout the ages. I can't believe I didn't read this earlier, and I strongly recommend it.
I listened to a free audio version performed by multiple readers from LibriVox.org. All LibriVox recordings are in the public domain - they are read by volunteers (some of them professional-quality) and available for free download. I love listening to audiobooks so I was very excited to discover it - right now I'm working my way through The Canterbury Tales, and I have several more books lined up after that.