which one? there are many:
* Inferno (Dante), the first part of Dante's Divine Comedy
* Inferno (novel), a 1976 novel by Larry Niven and Jerry Pournelle
* Inferno (Star Wars novel), a 2007 novel by Troy Denning
* Inferno (Strindberg), an 1897 novel by August Strindberg
* Isaac Asimov's Inferno, a 1994 novel by Roger MacBride Allen
* Inferno, a novel in the Bionicle Legends series
* Inferno, a dystopian planet in The Bull's Hour
well, which ever one it is, check on wikipedia, they have book summaries, that are fairly in detail.
Good luck.