That Weird Sad and Sort of Empty Feeling You Sometimes Get When You Finish A Book

Just Yesterday I finished David Foster Wallace's novel Infinite Jest. It was the third time I've read it since first buying it 1999 and this go-round was definitely the most enjoyable. I implore people to read this beast: it's one of those books you can get pretty involved with because it isn't exactly your linear narrative kind of journey and a good portion of DFW's prose is simply fantastic. I also would love to have someone (at least one person) to talk to about it that isn't just a faceless name on a message board.

A few things about IJ:
-it takes place sometime in the near future, maybe like starting around 2002 (it was first published in '96) and ending in 2011, though as readers these years aren't made explicitly clear because time has been subsidized and each year is named after the highest-bidding corporation. Most of the novel's "action" takes place in the Year of the Depend Adult Undergarment. (A funny side note--whichever company's product is selected for a particular year is then placed in the Statue of Liberty's hand for the entire year.) Two of my other favorite "years": Year of the Whopper and Year of the Perdue Wonderchicken.
-the main focus of the novel is divided between two, I guess, camps. 1) is the Enfield Tennis Academy--a private school for (obviously) gifted tennis players that was started by James O. Incandenza and is now maintained by his widow Avril and her "brother" Charles. The whole Incandenza family kind of functions as the main character(s). They are all basically really fucked-up in ways that are sad and very funny, but also not cliched or trite. After seeing The Royal Tannanbaums(sp?) I would definitely say Wes Anderson read IJ--some of the parallels are a bit too similar. (And this isn't to say that W.A. is a hack or rip-off artist, because I think he and his films are great. I'm using T.R.T. as an example because I know many of you have seen it and liked it and I'm envisioning the allusion as a sort of carrot dangling out there.) So anyways, I won't go into too much detail about them because it appears to be one of the situations where you can't say just one or two things about a character without having it feel reductive, i.e. you wouldn't call Leopold Bloom just and "Ad. man" and feel as if you sufficiently explained his character. And then 2) The Ennet House Drug and Alcohol Recovery House (sic), which is obviously ripe with other fucked-up characters, including Don Gatley, who would be the like main character of this part of the novel. Also here is Joelle van Dyne the Prettiest Girl Of All Time (P.G.O.A.T.) who must wear a veil because she is so "perfect" or is it that her face has been hideously and improbably deformed by being doused with acid?
-The novel is seemingly chaos in terms of structure--it often seems to jump around with no apparent reason. One definitely needs to be a fan a Keats's "Negative Capability."
-Major issues of aloneness, communication, addiction, how we entertain ourselves and to what extent are dealt with. At the center of the novel is the film "Infinite Jest" made by James O. Incandenza that is reportedly so entertaining once one views it their only need/want is to continue viewing the "entertainment" until you eventually expire in a pile/pool of your own waste.
Some other tidbits to hopefully get you reading:
-A band of Wheelchair Assassins from Quebec are involved ("The last noise you hear is the squeak.")
-Most of New England no longer exists because it is being used as a massive trash-dump. The trash is transported by huge catapults.
-The good 'ol U.S. of A. has been joined with Canada and Mexico to form the Organization of North American Nations, whose president is one Johnny Gentle (the first President to swing his microphone around by its cord at his inauguration--he was formerly a lounge singer.)

I could keep going.

Anywho-
After I finished I got that weird empty/sad feeling like a friend had been staying with me for a while and we were having a great, great time and then he suddenly left. I hate that feeling. Other books that have done that:
Ulysses
Great Expectations
Bleak House
Motherless Brooklyn
House of Leaves
Choke
Atonement
Geek Love
There are of course more, but off the top of my head those are the ones I came up with.

What books have done that to you?