Paperback bestsellers/trade.

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There's a new marketing campaign--aka party time--afoot at St. Martin's. As explained by SMP publicity manager Stephen Lee, "On January 30, we're organizing (through Kristin Hannah's Celebrate Our Stories House Party) 1,000 parties across the U.S., in which the party hosts will introduce guests to Kristin's books, and they'll spend an evening sharing stories, etc. We'll be promoting both Firefly Lane and True Colors at each party." (Check out houseparty.com/celebratingstories.) True Colors copies in print: 410,000.

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It's back--for the fourth year in a row. With more than 15 million copies sold, the CalorieKing …