Nancy Drew TWIN THRILLERS  4 LOT by Carolyn Keene.

The TWIN THRILLER book club editions were introduced in the 1970's by Grosset & Dunlap. They featured 2 stories in 1 book. The covers are lavendar/grey colored pictorial hardbacks with solid color on the back. The endpapers are white and black multi-scene.

• 3/4: The Bungalow Mystery/The Mystery at Lilac Inn
• 9/10: The Sign of the Twisted Candles/The Password to Larkspur Lane
• 18/19: The Mystery of the Moss-Covered Mansion/The Quest of the Missing Map
• 29/30: The Mystery at the Ski Jump/The Clue of the Velvet Mask

These books are in good to very good condition. The covers have minimal wear. The pages are intact and have normal page tanning. A great 4 book start for a collection of this 27 volume series!