When John Tauranac is not busy designing maps, he turns his talents to writing intriguingly on the city’s social and architectural history. In his latest book, “Manhattan’s Little Secrets,” Tauranac leads us on a fascinating hunt for the overlooked and under-seen around every corner. Come explore history hidden in plain sight on the Upper West Side! Do you know where to find actual stones from the dungeon where Joan of Arc was held? An ancient symbol of Christianity on an apartment house? An architect’s likeness cleverly worked into the statuary of his building? We guarantee you’ll be looking up, down and all around once you’ve been let in on Manhattan’s Little Secrets!