I am starting to make notes and do research for a novel, whose plot will follow the adaption of the protagonist from a theist position to an atheist one. I am envisaging something similar in style to a confluence of Huysmans and Marius the Epicurean, in the alternation of passages of exposition and narration, as told from the point of view of a first-person narrator, possibly other than the protagonist.
What other atheist fiction is out there? I would like to read more, and see how atheism is approached and handled by other sympathetic writers.