I think people love "the idea" of your idea. People love to imagine they're off on a vacation to Paris, and they'll have so much to think of, they'll probably want a locally-authored tour guide. So they're excited about traveling, going to Paris and finding lots of cool things to do there. But not necessarily from your guide books. When the time comes to actually go to Paris, the problem for you guys is that there's a TON of free information. You're competing with the simplest of all Google searches: "What should I do in Paris?", not to mention dozens of in-flight magazines, tourist info packets, maps, concierges, coupon books etc etc. When you're competing with so much free information, a $4.99 price point is too high, imho.