Lucy Fitch Perkins was an American author and illustrator of children's books. She is best known for her Twins series. The 26 volumes in the Twins series featured stories about twin siblings from different nations or different periods in history. The books appeared form 1910 to 1930. The most popular were The Dutch Twins, The Japanese Twins, The Eskimo Twins, The Puritan Twins, and The American Twins of the Revolution. These books are an excellent introduction to people and customs for young readers. The Spartan Twins