“Terry O’Reilly lets readers into the fascinating world of marketing. Looking at both successful and unsuccessful campaigns from brands that you likely have in your home, O’Reilly uncovers the truth behind the spin and why it works so well. Very accessible and highly entertaining, readers will come away more informed and loaded with trivia...This I Know will be the funnest business book you will read all year.” (Colin Holt, seller at Bolen Books, 49th Shelf)

"What makes This I Know engaging - like O’Reilly’s work in radio and the earlier Age of Persuasion book - is the author’s obvious love of his craft. He clearly also admires the work of retailers, marketers, brand managers and advertisers when they market to us, the customers, with intelligence and foresight." (Winnipeg Free Press)

"[F]ourteen sturdy, anecdote-infused chapters cover[s] the basics of marketing . . . in an engaging, memorable way.... [T]he book will keep you happy and engaged as you grapple with that marketing puzzle.” (The Globe and Mail)

“O’Reilly is well worth listening to. His book should be required reading for entrepreneurs, small business owners and leaders of nonprofits who don’t have monster marketing budgets and ad agencies on retainer.” (The Hamilton Spectator)