I've just begun reading the book, and the writing itself seems excellent. But the print job is terrible. Looks like a bad photocopy: the letters are not sharp, and many of the illustrations look like they've been soaked in mud; for example, the print of Dürer's "Melencolia I" is so dark not a single number of the "magic square" can be read. Maybe the printers thought a dark, blotchy, blottered look appropriate for a book on melancholy.