The book is full of useful information. However, the reproductions of da Vinci’s paintings are poor.
An example is the painting of Ginevra de’ Benci, a Florentine aristocrat (Fig. 14). Her cheeks glow with a red blush as if she had just seen a make-up artist. To understand what da Vinci’s painting of this elegant lady really looks like, download a copy from National Gallery of Art.