"An exploration of the Grand Canyon on a grand scale, as only Jason Chin can illustrate and explain."--

In watercolor sketches accompanied by text, the author records his impressions of the Grand Canyon.

John Wesley Powell always had the spirit of adventure in him. As a young man, he traveled all over the United States exploring. When the Civil War began, Powell went to fight for the Union, and even after he lost most of his right arm, he continued to fight until the war was over. In 1869, he embarked with the Colorado River Exploring Expedition-- ten men in four boats-- to float through the Grand Canyon. Ten explorers went in, but only six came out....

After discarding their infamous homework machine, four friends, now in sixth grade, find themselves once again at the police station, this time giving testimony about an incident involving a powerful computer chip, a Grand Canyon treasure, and a dead body.

Jake, Amber, and Wes encounter new dangers and find their friendship tested as they follow the clues Jake's grandfather hid away in the old scrapbook. The stakes are higher, and the history goes deeper as the three kids put their heads together to solve a puzzle that is perhaps hundreds of years in the making.--Publisher description.

Describes the deep trench known as the Grand Canyon, found in the Grand Canyon National Park, and the activities of visitors to the park.