All Along the Watchtower - Butler D.J.

The World of Heaven has been born again, and, weirdly, it was to a ragged bar band. 

Now that band struggles to make its way into a post-apocalyptic Chicago ruled by Yamayol the Bull, to seize from him the Ensign to the Nations. 

On the way, guitarist Eddie Marlowe aims to rescue his wife and settle a few old scores . . . unless they settle him first.