When does Mrs. Piggle-Wiggle return?

Mrs. Piggle-Wiggle is a series of children's books written by Betty MacDonald. The first book in the series was published in 1947. The series is about a small woman who lives in an upside-down house in a lively neighborhood. She has a chest full of magical cures left to her by her deceased husband, a pirate. The final book of the series is written by MacDonald's daughter Anne MacDonald Canham.