A complete sketchbook, containing 26 separate works from a 1970 album of watercolors by Pablo Picasso, is going on display in New York this week. “The full book from the collection of art dealer Heinz Berggruen was carefully unbound for framing, and will be reassembled for sale at $3.5 million. Such sketchbooks are very rare, as most belong to the Picasso family.” The entire album was created in a single week, and reveals a deeply personal side of Picasso’s late work.