This is the shortest of all the Jane Austen novels, and perhaps also the most simplistic in its storyline and outlook. The novel centres around 17-year old Catherine Morland, the sheltered daughter of a country clergyman, with a very active (probably overactive) imagination.
If you have been looking for a way into the Jane Austen mini-genre, then I would recommend this as a good starter book-(mainly due to its length.) There are no real 'bad' characters, the worst feels quite fictionalised, and the rest naive and a bit bland.
Not a whole lot happens in this book, its a simplistic story with a few morals thrown in, but as it is written with the same wit and insight that marks all of Austens novels, this brings it higher than many that have a lot more going on plot-wise.
A light read.