Odd's Door by W. S. Lacey
Roger North and Lewis Spender, students and friends in the early Twentieth Century, are on a mission. In order to win acceptance into a club of rational thinkers, they must solve a seemingly paranormal mystery. Spender has chosen the case of the insane playwright, Adelard Odd. One person reading Odd's writings was struck blind, and three other people disappeared while in his room at the Quartersoake asylum. Once at the asylum grounds, the two men find out soon enough that Odd's door , a door ostensibly leading to nothing, is an axis mundi that involves those entering in a myriad of shifting universes. North and Spender are soon separated; Spender is held up as a king in the civilization he happens upon. North reappears with one eye colored silver; he is now able to see past and future and is also gifted with sight in the subjunctive mood. They reunite and contend with multiple realities, described with a Douglas Adamsesque matter-of-factness. Trying to escape from a land run b...