He'll be talking with Heather Reisman at her Manulife Indigo bookstore on January 28. The event gets underway at 7:00 p.m., but you'll want to get there early because seating is limited and it's first-come-first-served.
Here's how it looked last time Mark hit the Manulife, way back in America Alone days (how long ago it seems!).
More details (i.e. the event's official rules) here.