"Step on a Crack" by bestselling mystery/suspense author James Patterson and Michael Ledwidge. First came Alex Cross. Then the Women's Murder Club. Now meet Detective Michael Bennett, NYPD - and his 10 children.

From the publisher:

The nation has fallen into mourning after the death of a beloved former first lady. The most powerful people in the world gather in New York for her funeral - the the inconceivable occurs. Billionaires, politicians, and superstars of every kind are suddenly trapped within one man's brilliant and cold-blooded scenario.

Detective Michael Bennett - father of ten - is pulled into the fray. As the danger escalates, Michael experiences a devastating loss: after fighting it for many years, his wife has succumbed to a terrible disease. As New York descends into chaos, he faces raising his 10 heartbroken children alone - and rescuing 34 hostages.

Day after day, Bennett confronts the  most ruthless man he has ever encountered. As the entire world watches and the tension builds to a searing heat, Bennett has to find a way out - or face responsibility for a deadly debacle.