9 books in series

Betsy-Tacy

Betsy-Tacy is a 9-book series with 9 primary works first released in 1940 with contributions by Maud Hart Lovelace and Lois Lenski.

Betsy-Tacy
Betsy-Tacy and Tib
Betsy and Tacy Go Over the Big Hill
Betsy and Tacy go downtown
Heaven to Betsy
Betsy in Spite of Herself
Betsy Was a Junior
Betsy and Joe
Betsy and the great world