The Betsy-Tacy Treasury, by Maud Hart Lovelace, is a series of four books in one volume. This fat, dog-eared book is a longtime favorite of my daughter's. Her younger siblings enjoy being read to from it as well. These stories from the late 1800s through the early 1900s follow the adventures of Betsy and her best friends. The books are based on the author's life. She is quoted as saying, "I lived the happiest childhood a child could possibly know." It must be true.