One of my favorites of that kind is Batman: Dead White, by John Shirley, which is about Batman trying to stop a new villain, the psychopathic, gargantuan Neo-Nazi called White Eyes, from destroying Washington DC.
Boulevard Books had an extensive line of Marvel prose novels back in the 1990's. For instance, Peter David wrote Hulk: What Savage Beast. Good stuff for the most part
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. john 3:16