Flying Buffalo has announced that they’ve sold out of fifth edition rulebooks for their classic Tunnels & Trolls RPG. Although the sixth edition isn’t ready yet (in fact, it’s still just a rumor, really), they had to print something, and thus, Tunnels & Trolls 5.5 has been created. It’s the fifth edition rules combined with the Buffalo Castle solo adventure and some extra material by creator Ken St. Andre and noted Battletech novelist Michael Stackpole. T&T 5.5 should be out in May.