I got the book through paperbackswap.com. On the cover, it states "Reese's Book Club" and there's a quote from Reese Witherspoon describing the book as "Beautifully written and incredibly funny." Describing the book as "incredibly funny" is (in my opinion) a gross mischaracterization of the book. Eleanor, the protagonist, is someone who has little in the way of social skills. Apparently, her ineptness in this area is what is so (supposedly) funny.
I felt somewhat sorry for Eleanor because of her quirky behavior that made it difficult for her to be accepted by her co-workers. Eleanor had no friends or social life. She spent her time outside work drinking at home. Early in the book the author hints that Eleanor had had something bad happen to her. It's not until nearly the end of the book that the full story is disclosed and one then understands why she drinks.
There's not a lot of "action" in the book--rather, it's the story of a woman who goes "down the rabbit hole" and emerges from it transformed.