Taking a break from practicing for a holiday dance performance to accompany her friend Davy to the beach, Maryellen finds a barnacle-encrusted ring buried in the sand that looks like lost treasure and is desperately sought by a group of strangers.

When a dashing man from Mexico City brings Tia Dolores a ruby ring for Christmas, Josefina notices that things start going wrong and she decides to get to the bottom of the mystery.

When an archaeologist's priceless jewel goes missing during a 1906 ocean liner voyage to Europe, eleven-year-old Samantha tries to discover which of the first-class passengers is the thief. Includes French glossary and historical information on travel and archaeology in the early twentieth century.

"Melody Ellison is impressed by her sophisticated new friend, Leah Roth, but she wishes her cousin Val would stop being so standoffish to Leah! Melody meets Leah's grandfather, Dr. Roth, a botanist who escaped the Nazis and brought a rare and valuable Lady's Slipper orchid with him to America. When Melody's own grandfather becomes a suspect in a burglary, Melody turns to Val and Leah for help. Yet Leah seems to be hiding something, something to do...

Scooter, Maryellen's pudgy pet dachshund, may be lazy, but he's one of the family, and Maryellen loves him dearly. And he never misses a meal! So when Scooter doesn't show up at dinnertime, she's worried. Maryellen launches a search and discovers some strange goings-on in her neighborhood. With the help of her friends and family, the search for Scooter takes Maryellen from the streets of Daytona Beach to the rocket launchpad at Cape Canaveral!

When Kit arrives in Kentucky to visit her aunt and brother she finds trouble brewing and locals blaming the CCC workers, leaving Kit to find the real culprit before things get worse.