Teen & Young Adult

Behind the Green Door

By Mildred A. Wirt (Penny Parker Mystery Stories #4)

Clue of the Silken Ladder

By Mildred A. Wirt (Penny Parker Mystery Stories #5)

Danger at the Drawbridge

By Mildred A. Wirt (Penny Parker Mystery Stories #3)

Ghost Beyond the Gate

By Mildred A. Wirt (Penny Parker Mystery Stories #10)

Guilt of the Brass Thieves

By Mildred A. Wirt (Penny Parker Mystery Stories #13)

Hoofbeats on the Turnpike

By Mildred A. Wirt (Penny Parker Mystery Stories #11)

Saboteurs on the River

By Mildred A. Wirt (Penny Parker Mystery Stories #9)

Signal in the Dark

By Mildred A. Wirt (Penny Parker Mystery Stories #14)

Swamp Island

By Mildred A. Wirt (Penny Parker Mystery Stories #16)

The Clock Strikes Thirteen

By Mildred A. Wirt (Penny Parker Mystery Stories #7)

The Cry at Midnight

By Mildred A. Wirt (Penny Parker Mystery Stories #17)

The Deserted Yacht

By Mildred A. Wirt AKA Ann Wirt (Madge Sterling #2)

The Missing Formula

By Mildred A. Wirt AKA Ann Wirt (Madge Sterling #1)

The Secret of the Sundial

By Mildred A. Wirt AKA Ann Wirt (Madge Sterling #3)

The Secret Pact

By Mildred A. Wirt (Penny Parker Mystery Stories #6)

The Wishing Well

By Mildred A. Wirt (Penny Parker Mystery Stories #8)