Book 1

Tale of the Witch Doll

by Mildred A Wirt

Published 20 December 2010

Book 2

The Vanishing Houseboat

by Mildred A Wirt

Published 21 December 2010

Book 3

Danger at the Drawbridge

by Mildred A Wirt

Published 20 December 2010

Book 4

Behind the Green Door

by Mildred A Wirt

Published 20 December 2010

Book 5

Clue of the Silken Ladder

by Mildred A Wirt

Published 20 December 2010

Book 6

The Secret Pact

by Mildred A Wirt

Published 21 December 2010

Book 7

The Clock Strikes Thirteen

by Mildred A Wirt

Published 17 December 2010

Book 8

The Wishing Well

by Mildred A Wirt

Published 21 December 2010

Book 9

Saboteurs on the River

by Mildred A Wirt

Published 26 January 2011

Book 10

Ghost Beyond the Gate

by Mildred A Wirt

Published 20 December 2010

Book 11

Hoofbeats on the Turnpike

by Mildred A Wirt

Published 21 December 2010

Book 12

Voice from the Cave

by Mildred A Wirt

Published 3 January 2011

Book 13


Book 14

Signal in the Dark

by Mildred A Wirt

Published 4 January 2011

Book 15

Whispering Walls

by Mildred A Wirt

Published 16 January 2011

Book 16

Swamp Island

by Mildred A Wirt

Published 27 January 2011

Book 17

The Cry at Midnight

by Mildred A Wirt

Published 20 December 2010
While out skiing at night, Penny, Louise, and Jerry hear strange sounds coming from a nearby monastery. They discover that a religious cult is living at the monastery. Penny tries to learn more about the cult, but the leader is very secretive. When Penny learns of a missing woman who is interested in cults, she becomes convinced that there is a connection. Penny masquerades as one of the cult members and learns the secret of the strange cult.