Robbie Arnett

Books
Hattie Harmony: Worry Detective Hattie Harmony: Worry Detective
Hattie Harmony: Worry Detective
2022
Thwistle Ping! Thwistle Ping!
Thwistle Ping!
2026
Hattie Harmony: Opening Night Hattie Harmony: Opening Night
Hattie Harmony: Opening Night
2023

Audiobooks
Hattie Harmony: Worry Detective (Unabridged) Hattie Harmony: Worry Detective (Unabridged)
Hattie Harmony: Worry Detective (Unabridged)
2022
Hattie Harmony: Opening Night (Unabridged) Hattie Harmony: Opening Night (Unabridged)
Hattie Harmony: Opening Night (Unabridged)
2023
Thwistle Ping! (Unabridged) Thwistle Ping! (Unabridged)
Thwistle Ping! (Unabridged)
2026