Many people know that Frida Kahlo (1907-1954) was a Mexican artist, a feminist icon who lived in the famous Blue House and whose work includes The Two Fridas. What, perhaps, they don't know is that 55 of her 143 artworks are self-portraits; that her painting Roots holds the record for a Latin American artwork, having sold for $5.6 million in 2006; that her love letters sold for $137,000; that she married her husband twice; or that she arrived for...