Sure, you can pick something cool off of the shelf and call it a day, but the best birthday gift ideas come when you zero in on a topic the person of honor is passionate about. From there, you can find something truly unique that they’re guaranteed to go crazy for. This works for anyone you’re shopping for—a man, a woman, or even a child. The reader will gladly light that literary-inspired candle the next time she curls up with a novel. And the kid who can’t put down his phone? Well, he just may put it down to play with the retro-inspired viewfinder that features his very own photos. And, because you’re bound to have a question or two about the etiquette that surrounds gift giving, we’ve enlisted our Modern Manners columnist, Catherine Newman, to answer your most pressing questions about giving and receiving presents, as well as thank-you notes.