Marie-Chantal, Crown Princess of Greece, is the author of a popular parenting blog and founder and creative director of Marie-Chantal, a leading international childrenswear brand. Born in London, and one of three sisters, she studied art and design at the New York Academy of Arts and New York University. She married Pavlos, Crown Prince of Greece, in 1995, and they have five children. Dr. Perri Klass is an eminent pediatrician and professor of journalism and pediatrics at New York University. She is also the national medical director of Reach Out and Read, a childhood literacy program. A multi-award-winning author of numerous books on parenting and medicine, she writes a weekly column-""The Checkup""-for the New York Times. She has three children. Nicholas Child is a children's book author and illustrator based in Cheshire, England. Creator of the home and lifestyle brand The Grumble & Co, he writes and illustrates children's books and designs greetings cards and other products for various international brands.