The oeuvre Duchamp left us is small and repeatedly subject to multiple interpretations of the art historical, psychological, socio-critical and alchemical persuasion. And yet, how odd: Duchamp’s last painting, Tu m’ from 1918, has never drawn extensive attention among his exegetes. The title itself poses a riddle: Does it mean “tu m’aimes” (you love me), “tu m’embêtes” (you bore me) or “tu m’emmerdes” (you can kiss my ass)? Karl Gerstner, a prominent Swiss graphic designer who knew Duchamp personally, was taken aback the first time he saw Tu m’, but also intrigued. Having acquired a reproduction of the picture, Gerstner proceeded to penetrate its meanings and surfaces more and more deeply; as his surprise faded, his fascination grew. Enter this book, encouraged by artist Richard Hamilton (perhaps the most intimate of Duchamp connoisseurs), and its 20 analytical essays of riddle-solving. Essay by Karl Gerstner.