Transformations: A Novel of Human Evolution by John Nelson

Angelic extraterrestrials give the human race a lesson in accelerated evolution, infecting inhabitants of a small coastal California town with a genetically altered virus that precipitates this leap forward. As a wunderkind geneticist, Dr. Guy Joyner, helplessly watches his patients go through all the subsequent physical, emotional, and spiritual trials, he learns in the end that evolution is a matter of spiritual self-transcendence and can’t be forced by genetic manipulation.