The Betsy-Tacy Treasury By (author): "Lois Lenski, Maud Hart Lovelace"Genres:Fiction books Childrens books Middle Grade books Classics books Historical Fiction books ISBN0060249196ISBN139780060249199AsinThe Betsy-Tacy TreasuryOriginal titleThe Betsy-Tacy TreasurySeriesBetsy-Tacy #1-4The first four books in the Betsy-Tacy series: Betsy-Tacy, Betsy-Tacy and Tib, Betsy and Tacy Go over the Big Hill, and Betsy and Tacy Go Downtown.