I recently discovered (but have not yet read) this novel by Tom De Haven. It is the story of Superman as told in a slightly more realistic style. (Like the original version, he debuts in 1938, but unlike the original, he is based out of New York City.)

My understanding is that this series is a mix of pulp cheese and historical fiction. As a fan of Caleb Carr, Cavileer and Clay, and Carter Beats the Devil, I'm hoping I'll enjoy this.

You can buy it on Amazon.