Children's writer who won the 1986 Newbery Medal for Sarah, Plain and Tall. Her other works in the Sarah, Plain and Tall series include Skylark, Caleb's Story, and More Perfect Than the Moon.
She attended the University of Connecticut. In 1980, at the age of forty-two, she published her first novel, Through Grandpa's Eyes.
Her numerous stand-alone novels include Tomorrow's Wizard, Unclaimed Treasure, and Journey.
She was born in Cheyenne, Wyoming. In 1962, she married longtime partner, Robert MacLachlan. She has two sons, John and Jamie.
Her popular book, Sarah, Plain and Tall, was adapted into a 1991 TV movie starring actress Glenn Close .