22 - Behind the Green Door by Mildred A Wirt Benson

25 - Behind the Green Door by Mildred A Wirt Benson

Behind the Green Door follows teen detective Penny Parker as she investigates a mystery at a ski resort. A reclusive old man keeps his granddaughter imprisoned in a remote cabin, and suspicious figures lurk around the lodge. Penny’s fearless sleuthing leads her straight into danger.

24 - Behind the Green Door by Mildred A Wirt Benson

Behind the Green Door follows teen detective Penny Parker as she investigates a mystery at a ski resort. A reclusive old man keeps his granddaughter imprisoned in a remote cabin, and suspicious figures lurk around the lodge. Penny’s fearless sleuthing leads her straight into danger.

23 - Behind the Green Door by Mildred A Wirt Benson

Behind the Green Door follows teen detective Penny Parker as she investigates a mystery at a ski resort. A reclusive old man keeps his granddaughter imprisoned in a remote cabin, and suspicious figures lurk around the lodge. Penny’s fearless sleuthing leads her straight into danger.

22 - Behind the Green Door by Mildred A Wirt Benson

Behind the Green Door follows teen detective Penny Parker as she investigates a mystery at a ski resort. A reclusive old man keeps his granddaughter imprisoned in a remote cabin, and suspicious figures lurk around the lodge. Penny’s fearless sleuthing leads her straight into danger.

21 - Behind the Green Door by Mildred A Wirt Benson

Behind the Green Door follows teen detective Penny Parker as she investigates a mystery at a ski resort. A reclusive old man keeps his granddaughter imprisoned in a remote cabin, and suspicious figures lurk around the lodge. Penny’s fearless sleuthing leads her straight into danger.