The Devil’s Half Mile by Patrick “Paddy” Hirsch Forge/Tom Doherty Associates, $24.99, 289 pages, ISBN 978-0-7653-9913-7 Wall Street trickery, corrupt politics, racial strife, gangs, murder . . . that all sounds like the headlines from today’s news, but instead, it’s the lead-in on the cover of a nifty murder mystery which takes place in New York City in the year of our Lord, 1799.  Through the skill of Alexander