Baccano! (Novel)

Synopsis

From Yen Press:
New York, 1931. The manufacture and sale of alcoholic beverages is prohibited by law, but behind this prohibition, organized crime flourishes-so, too, do bank robbers, bootleggers, assassins, and homunculi. Some want money, some are chasing the secret to immortality, and others just want to have a really good time. You know what they say, though: You can't always get what you want.

Note: Won the Gold Prize at the 9th Dengeki Novel Awards in 2002.

Synopsis & details from MangaUpdates