Question: are durarara and baccano in the same universe?
Answer: Naritaverse. The Naritaverse is the unofficial name for the universe in which Baccano! is set alongside Durarara!!, Vamp!, and Etsusa Bridge, three other light novel series written by Ryohgo Narita, and Narita's Wednesdays Smiling with Otsuberu. The series can be read in any order.