Gertrude Chandler Warner

When the Alden children go camping on Blizzard Mountain, a place said to be inhabited by a ghost looking for buried treasure, they begin to think someone or something is trying to scare them off.

What will the Aldens discover on a vacation to a beautiful island in the South Seas? The island is supposed to be deserted, but as the Aldens explore, they start to find signs that they suggest they are not alone.

The Aldens head to Ladakh, a territory in northern India, to help save the elusive and critically endangered snow leopard.

The Aldens have joined Dr. Iris Perez as she investigates legendary creatures around the world. In this adventure, the children investigate what might be living in the deep trench off the coast of Puerto Rico. From manatees to mermaids to sea monsters, creatures of the sea have been attracting tourists to the area for years. But when a man on a nearby island goes missing, it's up to the Aldens to sort out fact from fiction. Description not yet available....

After finding a statue in an old trunk, the children travel across the country with the statue and six mysterious boxes an in attempt to make sure the treasures all stay where they belong.