The Adventures of Mary-Kate and Ashley (1996–1997) — book series in order

Manyebook

The Case of the Christmas Caper (1996)
The Case of the Mystery Cruise (1996)
The Case of the U.S. Space Camp Mission (1996)
The Case of Thorn Mansion (1997)
The Case of the U.S. Navy Adventure (1997)
The Case of the Volcano Mystery (1997)