Johan Kugelberg isn’t much of a collector anymore. The founder of the gallery Boo-Hooray instead relishes sharing the treasures he discovers with others. “It’s more about getting to commune with these pieces,” he says at his downtown New York office, where he sits surrounded by books, posters and artwork of the counterculture movements he preserves. “You can touch an object and feel it vibrate with its own energy, just because what it is and where it’s been.” Boo-Hooray Presents: Post-War, Counterculture, & Pop – an online auction in partnership with Sotheby’s taking place 1–16 December – is full of such objects. Kugelberg vibrates with his own energy as he talks about a few of his favourite pieces available in the sale. —Bill Crandall