Bret Easton Ellis

In my opinion, Ellis is the master of monologue in novel. Except Glamorama, all his books are mammoth monologues of some sense. American Psycho is the neverending monologue of the infamous Patrick Bateman, Rules of Attraction is a collection of monologues of different people telling the same story by their own perspective, and Less Than Zero is the monologue of a underaged guy inbetween cocaine addicts.

Ellis is also very succesful in linking books into each other by small crossovers. Actually, his books can be regarded as stories that look at cross sections of a generation. In Rules of Attraction we meet Patrick Bateman, who is the brother of one of the main characters. In Glamorama, we meet him for 5 seconds at a bar where he is trying to hide his blood stained clothes from his friends. If Less Than Zero is high school years, and Rules of Attraction college, then American Psycho and Glamorama tells how these people become adults.

Published books:

Less Than Zero (1985)
The Rules of Attraction (1987)
American Psycho (1991)
The Informers (1994)
Glamorama (1999)

• Less Than Zero: Camden, the college most of The Rules of Attraction takes place in, is referred to several times, with both Clay and Daniel attending it.
• The Rules of Attraction: Clay, the main character and narrator of Less Than Zero, is a minor character here and narrates one chapter, which begins with a Zero in-joke. He is mentioned a few times as "The Guy from L.A." before being properly introduced. Main character Sean Bateman is brother of American Psycho's Patrick Bateman. Patrick himself appears briefly and also narrates one chapter.
• American Psycho: Sean Bateman appears briefly. Camden is referred to as both Sean's college and the college a character named Vanden is going to. Vanden was referred to (but never appeared in) Less Than Zero.
• Glamorama: Main characters Victor Ward and Lauren Hynde were first introduced in The Rules of Attraction, Lauren being a major character and Victor a minor but significant one. Patrick Bateman appears briefly. Bertrand, Sean and Mitchell, all from The Rules of Attraction, appear in a Camden flashback and many other Rules characters are referred to. Alison Poole was a minor character in American Psycho and in fact first appeared as the main character in Jay McInerney's 1989 novel Story of My Life.

Haven't read The Informers and Glamorama yet, so the info (or lack thereof) regarding those two is secondhand. Please /msg me if you have anything to add.