If you like David Foster Wallace his other two novels "Broom of the system" and "The Pale King" are also great. The Pale King was left unfinished when he died and was completed (from various drafts and notes) as a labour of love and respect from his notes by his editor. It's genuinely extraordinary and could possibly even have been his greatest work if he had been able to fully complete it. As is there are certain minor things in it that I'm sure he would have revised (eg I noticed some sentences are repeated etc).
If you're not sure about David Foster Wallace I can really recommend his essays and literary criticism as consistently insightful and extraordinary and also his journalism. From his essays for a starting point I would recommend "De Unibus Pluram" and also "Fictional futures and the conspicuously young", and also "Roger Federer as Religious Experience"[1]. Of his journalism I would strongly recommend "Getting away from already being pretty much away from it all" which is an amazing write up of the experience of visiting a rural state fair and "A supposedly fun thing I'll never do again" which is the same sort of thing about going on a cruise ship. Both are very funny and perceptive.
If you like those you know what you're getting into with this novels.
[1] Especially if you like tennis. He also wrote an amazing essay about a tennis player who is very good but not quite good enough to make the top level and is struggling to break through. THat one is amazing but the title escapes me.
