The Adventurer's Handbook is becoming something of an Apatown reunion with Jason Segel signing on the dotted line to join Jonah Hill and Jason Schwartzman in the globe-trotting comedy.

Segel will play a once-promising musician who hits the bottle when his career hits the skids. Along with two friends, a lonely engineer (Hill) and a once Grammy-winning artist gone to seed (Schwartzman), he embarks on an extreme, planet-straddling expedition to break the monotony of their lives.

Hot Rod's Akiva Schaffer will directing the movie, which is inspired by Mick Conefrey's book "The Adventurer's Handbook: Life Lessons From History's Great Explorers." Loosely inspired, you'd imagine, since the book recounted the exploits of Ernest Shackleton and Captain Cook, among others, and we can't see Universal sanctioning an actual bid for the North Pole.

With his upcoming role alongside Jack Black in Gulliver's Travels, Segel's career has taken a turn for the intrepid. Hill, meanwhile, is trying his hand at screenwriting and is collaborating on the script for The Adventurer's Handbook with Matt Spicer and son of the Fonz, Max Winkler.

According to The Hollywood Reporter, the studio hope to go into production on The Adventurer's Handbook in early 2010