Descriptions of Emily Giffin's six novels all sound more or less the same: everything's going swimmingly for a character until a person or piece or news or something else invades, changing life forever. But familiarity breeds book sales. In Where We Belong ($29.99, St. Marten's), which took only four weeks to hit the New York Times and Globe and Mail bestseller lists, a successful TV producer gets a blast from her past in the form of someone she'd hoped never to have to deal with. Giffin signs copies of the book tonight (Thursday, August 30) at Indigo Manulife. See listing.