An exquisite selection of 160 natural history drawings and watercolors by Leonardo da Vinci, Alexander Marshal, Maria Sibylla Merian, and Mark Catesby, and from the collection of Cassiano dal Pozzo, works all held in the Royal Library at Windsor Castle. With essays by David Attenborough, Susan Owens, Martin Clayton, and Rea Alexandratos.  (NAT132, $37.50)