Dark Tower:The Long Road Home #2 of 5

Sheemie experimented on by robot in the Dogan("North Central Positronics Psychic Enhancer Assistant"), Roland still in the eye of Maerlyn. Roland encounters Marten there, manages to come conscious while being carried across crappy bridge. Apparently orb trying to use him to escape by being dropped. Very 'One Ring'. Sheemie has teleportation powers now.