The Alden children meet Mike Wood and a strange chain of events begins. Mike's house is mysteriously burned down, a man in a blue hat appears, and the Alden's uranium mine is in danger of being sabotaged. The four children solve the mystery.

Sixth-grader Ben Pratt's life is full of changes that he does not like--his parents' separation and the plan to demolish his seaside school to build an amusement park--but when the school janitor gives him a tarnished coin with some old engravings and then dies, Ben is drawn into an effort to keep the school from being destroyed

The mysterious death of an eccentric millionaire brings together an unlikely assortment of heirs who must uncover the circumstances of his death before they can claim their inheritance.

Resolving to earn so much money that his mother will no longer stress out over the bills, eleven-year-old Timmy Failure launches a detective business with a lazy polar bear partner named Total but finds their enterprise "Total Failure, Inc." challenged by a college-bound spy and a four-foot-tall girl whom Timmy refuses to acknowledge.

When his best friend disappears from her bedroom in the middle of the night, thirteen-year-old Theo uses his legal knowledge and investigative skills to chase down the truth and save April

While trying to outwit his arch enemy Pete the Barncat, Hank the Cowdog is duped into believing a worthless corncob will bring him fame and fortune

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

Hank the cowdog, Head of Ranch Security, matches wits with an escaped circus monkey

Fearless Hank the Cowdog, Head of Ranch Security, enters the "dark unchanted forest" to rescue his master's son from Sinister the bobcat.

Hank the Cowdog goes to the rescue as a wild, one-eyed horse creates havoc on the ranch but some of his outrageious stunts get him into more trouble than he bargained for