When an author passes away, it is fairly common for them to leave behind unfinished manuscripts. In other cases, authors have outlined an entire series of books, but are unable to complete them all. Sometimes called continuation books or series, these twelve tag-teamed projects were all started by one author and finished by another.
Did you know that Eoin Colfer, author of the Artemis Fowl series, also wrote book #6 in The Hitchhiker's Guide to the Galaxy series by Douglas Adams? Or that David Foster Wallace's editor finished writing The Pale King? True story. Turns out, there have been other handoffs and collaborations, so here are five of the best and the stories behind them.