The Unwritten Fables is a five-issue crossover event in which The Unwritten's Tom Taylor traveled into a un-canon universe of Fables. The story ran from issues 50 to 54 of The Unwritten and was collected in that series's ninth volume.
*Note: Tom visits an alternate version of the "Fables" universe where Mister Dark was never defeated. The versions of the characters that appear in this storyline differ (sometimes greatly) from the those appearing in the ongoing "Fables" series. The events in this book storyline do not directly effect "Fables"
The worlds of FABLES and THE UNWRITTEN collide in the epic comic event from THE UNWRITTEN #50-54 as a terrible foe has seized the fairytale homelands and our world. In desperation, the witches of Fabletown must summon the greatest mage the worlds have ever seen.