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We were addicted to Rick Steves when we planned our trip to Italy, but now we have to live vicariously through the renowned travel expert (can you say college loans?). The entertaining author of 30 guidebooks and host of travel shows on PBS will talk about “Europe Through the Back Door’’ and show you how to get the best bang for your buck (or euro), avoid crowds, pack smart, and eat well. We didn’t need much help in that last department. Dec. 3 at 6 p.m. Free. Boston Public Library Rabb Lecture Hall, 700 Boylston St., Boston. 617-536-5400. www.bpl.org