Behind That Curtain, published in 1928, is the third novel in Earl Derr Biggers’s celebrated Charlie Chan detective series. Set in San Francisco, the story sees the wise and observant Inspector Chan unraveling a complex case involving a missing heiress, international intrigue, and long-hidden secrets. Biggers’s engaging plotting, clever dialogue, and Chan’s warm, methodical intelligence helped elevate the series into one of the most beloved contributions to the Golden Age of detective fiction.