You may have heard of Jeffrey Eugenides - he wrote [b:Middlesex|2187|Middlesex|Jeffrey Eugenides|https://d.gr-assets.com/books/1394387122s/2187.jpg|1352495], which had quite a success (and got a Pulitzer) (and which is a very good book), and [b:Virgin Suicides|10956|The Virgin Suicides|Jeffrey Eugenides|https://d.gr-assets.com/books/1319032910s/10956.jpg|812415] - yes, it's a book, originally, and I found it better than the movie, but then I might have a problem with Sofia Coppola, haven't seen a movie from her I liked so far :P

Anyway, Marriage Plot. It's the story of a girl and two boys, all freshly out of college - Madeleine (English major), Leonard (biology major) and Mitchell (religious studies/theology major). Mitchell is in love with Madeleine who's in love with Leonard who's in love with Madeleine, but who's also manic-depressive - which is probably not the easiest of conditions to live with, both for one self and for people sharing one's life.
We follow these three people during the few months/year after they graduate, and in flashbacks from previous events; all in all, it's definitely an example of what I call "a book with people in it" - you can't say there's much going on, apart from day-to-day life of, well, people, who still may have somewhat out of the ordinary lives.

I liked it a lot, but it's definitely not a fun or good-mood book, it's at times pretty dark/uncomfortable. It's probably not as good as [b:Middlesex|2187|Middlesex|Jeffrey Eugenides|https://d.gr-assets.com/books/1394387122s/2187.jpg|1352495], but IMO still worth reading.