Skurzynski, Gloria

Usually antagonistic, Gina and Justin, twelve-year-old cousins, come to a better understanding of each other during a night trying to survive a flash flood and other dangers in the western mountains.

Jack, Ashley, and their parents visit Hawaii where they meet a Vietnamese boy who is going to live with his American grandfather whom he has never met, and are pursued by the Goddess Pele.

Examines the ways humans have measured time throughout history and discusses the various units that are used to keep track of it.

Examines the history of labor unions in the United States, and describes the conditions faced by the early worker force, which was made up of settlers and immigrants, and also covers strikes and the famous strike leaders.

Jack and Ashley Landon accompany their mother, who is investigating a bear attack, to the Great Smoky Mountains National Park where they meet two new friends who are involved in an argument over ancestral lands.

While at St. John National Park in the Virgin Islands for a seminar on coral reefs, the Landons help a wealthy thirteen-year-old to find his birth mother, who he believes is in danger.

Twelve-year-old Jack and his younger sister visit Mesa Verde National Park, where they delve into the park's history while gradually uncovering the mysterious past of their family's teenage foster child Lucky.

While their parents study why wolverines are disappearing from Alaska's Denali National Park, Jack and Ashley are stranded in a remote area with their mysterious new foster brother when a hit man's bullet triggers an avalanche.

In 1917, as the United States enters World War I, ten-year-old Hank sees change all around him in his western Pennsylvania steel mill town and feels his older Ukrainian friend Billy drifting apart from him.

The inner workings of the postal system are revealed as the author traces the path of a little girl's letter from her home in New Mexico to her cousin's home in Utah. Includes tips on how to address an envelope.