The document provides background information about author Patricia MacLachlan and summarizes her book "Sarah, Plain and Tall". It discusses the setting of the American prairie in the 19th century. The story follows Anna and Caleb Witting who place an ad for a wife after their father becomes widowed. Sarah arrives from Maine to visit and the children hope she will overcome her homesickness to become part of their family. The document also outlines vocabulary words used in the story and suggests post-reading activities and discussion questions.