Historically, self-portraiture has been a problematic genre for many artists because of the necessity both to reveal and to conceal. For this reason, it can tell us things about artists that we otherwise would not know. The genre also provides scholars with a broader context for speculation about artists’ personal lives, their creative motivations, professional ambitions, and psychological fears. John J. Ciofalo’s book on Goya’s self-portraits gives admirable scope for scholarly speculation from a highly...