When Lacey lands a starring role in a movie opposite one of Hollywood's hottest actors, she struggles with the realities of life in the spotlight before a malicious saboteur changes her perspective about her ambitions.

Fifteen-year-old Tam Ling Fan disguises herself as her twin brother, journeys from her village in China to California, and works as a laborer on the Transcontinental Railroad--where she faces danger on multiple fronts--to earn the money her family desperately needs. Includes author's note.

Nancy goes undercover at the exclusive Green Club when George's cousin, a candidate for city council, is targeted by a mysterious saboteur who threatens the plans to build a new sports complex.

When every kid in town auditions for a television talent show, Nancy, Bess, and George must uncover who is sabotaging the auditions.

Stella North is one of twelve young pilots competing in a 1937 air race meant to promote peace in Europe, but when one of her competitors is sabotaged, Stella races to determine who is capable of murder, and who might be the next victim.

When Joe and Frank Hardy stop a group of ranch hands from stealing the Welch family's prize horse, they are invited to help drive cattle back to the Welch ranch, where they encounter dangerous acts of sabotage.

Ravenskill is hosting the Golden Frog Games, a magical tournament, but somebody is using forbidden hexes to turn contestants into stone; meanwhile Seven Salazar, future "uncle" of Ravenskill, who is supposed to have the power to communicate with animals, has a secret--the only voices she hears belong to the deadly monstruos.

"Wanting to create a science fair project that makes an actual difference, Jessie decides to test a local creek for pollutants before her experiments are sabotaged by suspicious accidents"--

Taking a road trip to San Jose along Route 66 while stopping in Chicago, St. Louis, and other iconic cities, the Thea Sisters are dismayed to learn that an unknown saboteur has wiped a special video game project off of a programmer friend s computer.