The Impossible collection is a luxury book published by Assouline, profiling the 100 Most Coveted Artworks of the Modern Era. Compiled by Philippe Ségalot and Franck Giraud, seeing the two art dealers compile what they consider The Impossible Collection, or the best theoretical collection of modern art, from Picasso to Pollock, Twombly to Murakami. The book is of extremely high quality and available for $500. More info here.