Other Dimensions (Omnibus) [signed]

This is an omnibus of four novels by Robert Silverberg, issued by the Science Fiction Book Club (not to be confused with the 1973 anthology of stories by the same title, edited by Silverberg). With an introduction by the author, and these novels: The Man in the Maze (1969); Nightwings (1969); Up the Line (1969); Dying Inside (1972).