A friendly writer with a metal detector, the mysterious inhabitants of a tower house, and the discovery of a locket in the sand are ingredients for the Aldens' latest mystery.

While on bicycle trip to their aunt's farm, the four Aldens help solve a mystery.

A family, snowbound in a vacation cabin, discovers adventure in surrounding wild life, three children they find in the snow, and a search for a lost recipe.

While canoeing and backpacking near Timberwolf Lake, the Aldens receive strange warnings to stay away from the area and stumble upon clues to a missing cache of stolen coins.

When their grandfather arranges for them to spend two week at Sunny Oaks, the four Alden children enjoy settling into the routines of farm life but become suspicious about a mysterious horse locked in the stables.

The Alden children suspect someone of trying to sabotage the local dog show.

While helping fix up the old house their cousins have bought, the Aldens hear stories about its being haunted and find evidence suggesting that there may be a ghost there.

A little boy who has lost his mother and father and now lives with his grandmother brings a lost dog from the animal shelter home with him and learns that when it comes to love, it's quality not quantity that counts.

Muktar, an eleven-year-old refugee living in a Kenyan orphanage, dreams of tending camels again, as he did with his nomadic family in Somalia, and has a chance to prove himself when a traveling librarian with an injured camel arrives at his school.

In the late 1800s, Marianne travels westward on the Orphan Train in hopes of being placed with a caring family.