The two novels combined in this omnibus (Caldé of the Long Sun and Exodus from the Long Sun) comprise the second half of Gene Wolfe's long novel, The Book of the Long Sun.

Gene Wolfe (1931-2019) was the Nebula Award-winning author of The Book of the New Sun tetralogy in the Solar Cycle, as well as the World Fantasy Award winners The Shadow of the Torturer and Soldier of Sidon. He was also a prolific writer of distinguished short fiction, which has been collected in such award-winning volumes as Storeys from the Old Hotel and The Best of Gene Wolfe.
A recipient of the World Fantasy Award for Life Achievement, the Edward E. Smith Memorial Award, and six Locus Awards, among many other honors, Wolfe was inducted into the Science Fiction Hall of Fame in 2007, and named Grand Master by the Science Fiction and Fantasy Writers of America in 2012.