James Blish

James Blish's seminal treatment of religion in SF, a Hugo Award-winning precursor to The Sparrow. With a new introduction by Ken MacLeod.

It is written that after the Giants came to Tellura from the far stars, they abode a while, and looked upon the surface of the land, and found it wanting, and of evil omen. Therefore did they make men to live always in the air and in the sunlight, and in the light of the stars, that he would be reminded of them. And the Giants abode yet a while, and taught men to speak, and to write, and to weave, and to do many things which are needful to do, of which the writings speak. And thereafter they departed to the far stars, saying, Take this world as your own, and though we shall return, fear not, for it is yours.--THE BOOK OF LAWS

One of the very best must-read SF novels of all time.

Winner of the Hugo Award - The future of Earth will rely upon one man's sense of right and wrong. . . . Father Ruiz-Sanchez is a dedicated man--a priest who is also a scientist, and a scientist who is also a human being. He has found no insoluble conflicts in his beliefs or his ethics . . . until he is sent to Lithia. There he comes upon a race of aliens who are admirable in every way except for their total reliance on cold reason; they are incapable of faith or belief. Confronted with a profound scientific riddle and ethical quandary, Father Ruiz-Sanchez soon finds himself torn between the teachings of his faith, the teachings of his science, and the inner promptings of his humanity. There is only one solution: He must accept an ancient and unforgivable heresy--and risk the futures of both worlds . . .