This is a cute, and very brief, look at mental illness amongst some of the proverbial crowned heads of Europe. Each monarch has a few pages devoted to him- or herself, and there is generally a portrait of some sort to show the individual.
The monarchs ranged from Ivan the Terrible to Marie Antoinette, with many stops along the way. The one factual inaccuracy I saw was in the section on Louis XIV, which said he was married to Marie-Therese of Austria; he was married to Marie-Therese of Spain.
Otherwise, a short and entertaining read.