This book follows a format that I think is very popular with college/masters students, but is not as often seen in popular fiction and is extremely difficult to do well. Well, she doesn't just do it well, she does it very well, and as a result this should be required reading for anyone attempting it.
This book is a series of linked short stories, along the lines of Davis Sedaris and Laurie Notaro. But this is fiction, not creative non-fiction, and I just don't think you see this as often in fiction. I read the book in the first place because the author came to speak at my college, and I thought the reading she gave from it was so damn clever, and she was so damn impressive that it simply had to be read.
The characters are complex, and as you watch them at these different points in your life, the entire pitcture slowly falls into place. It's definitely a good read, and different enough to feel like you've just splashed your face with water.