Extinction by Mark Alpert Thomas Dunne Books, St. Martin’s Press, $25.99, 373 pages, ISBN 978-1-250-02134-2 Ever heard about something called the Singularity?  It’s an interesting noun with a couple of different meanings.  First, according to my Oxford English Language Dictionary, there’s the general definition:  The state or condition of being singular.  Then there’s the math & physics usage: The point at which something becomes infinite.  The third, and for