In the final part of the part of our biography of Johannes Kepler, we look at his scientific work from 1612 to his death in 1630 including the Epitome of Copernicus, Harmonice Mundi and the Rudolphine Tables. We consider the accusations of witchcraft against his mother, Katharina, and a number of other personal tragedies. In conclusion we discuss the Somnium, Kepler's work of science fiction.