san marcos retail

Used books still in style at Cassidy’s

Tom McDevitt’ sat behind the large front counter at Cassidy’s Books, in the shadow of Fry’s Electronics at a back-of-the-curve, out-of-the-way strip mall considering North County literary options. “The Book Mart on Grand Avenue in Escondido has been there 40 years,” McDevitt said with the  deliberate, studied manner one might expect from a bookseller. “Escondido used to have three or four book stores. Now, it’s…