Untouchable Volume 2 (Saul Imbierowicz Trilogy)

 Saul Imbierowicz's life literally changed when Al Capone murdered him, and he was reborn as a vampire. Now Saul is working for Eliot Ness, trying to take down the famous gangster. But Saul's new "life" isn't what he expected, and an offer from Capone to answer Saul's many questions about being one of the living dead comes at a price that Saul is unwilling to pay. Being partnered with Agent Christian Wright, who sees Saul as an abomination and an affront to God, isn't great either, but the fledgling partnership must succeed before a vampire war engulfs Chicago.