Helping Grandfather's friend, Mr. Yee, who has broken his arm and cannot tend a beloved vegetable plot, the Alden children begin investigating when they discover that vegetables have gone missing and that someone is vandalizing the garden.

"When the Alden children see odd lights coming from a closed amusement park and they receive a phone call warning them to stay away, they are determined to figure out what is going on at the park"--

The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

On an island nation in the Indian Ocean, the explorers venture through a vast underwater world and take part in a friendly robotics competition. But the tides of good fortune change quickly. Suddenly, Team Cousteau jumps into action to rescue a faculty member from the brink of death. Meanwhile, the team follows the Cruz's mother's clues to a magnificent tomb and center of spirituality precariously perched on the side of a cliff. There, Cruz is confronted...

"STAMPEDE!" Isaiah yells as the herd heads straight at his and Ethan's tent... Twelve-year-old Isaiah Rawlings wished for only one thing this summer, a camping trip outside of Kentucky. I'm so tired of camping in my backyard, he groaned. Isaiah pleads with his parents to reconsider their usual summer trip to dusty old museums and big cities. When his dad unexpectedly announces a trip to Grand Teton National Park, Isaiah is ecstatic! On the second...

"Cruz Coronado grapples with an important secret as the gang heads to China in search of the second-to-last piece of the cipher. Under the watchful eye of a new adviser, life on the ship returns to almost normal ... Almost. Just as things seem to be going smoothly, a familiar face shocks Cruz back into reality, and the final piece in this life-and-death scavenger hunt veers toward a dead end."--