In this rollicking adventure set during the California Gold Rush, Jack's aunt is forced to sell her beloved mansion to meet her debts. She is still unable to raise enough money to pay her creditors, and twelve-year-old Jack goes to California in search of gold to help her. Joined by his trusty butler, Praiseworthy, Jack finds adventure and trouble at every turn.

"Explores the California Gold Rush by examining the causes leading up to it and the immediate and lasting effects it had on the people and places involved"--

Text and photographs provide information about Bodie.

Moving into an inherited mansion in Maine with their mother and stroke-afflicted father, three siblings uncover a mystery involving hidden passageways, family rivalries, and healing waters.

Inspire students with amazing stories from the California Gold Rush. With the use of personal accounts, newspaper stories, and other primary sources, the events of this fascinating time in history come to life.

Award-winning author Don Brown explores a very timely subject: the history of vaccines A Shot in the Arm!, book 3 in the Big Ideas that Changed the World series, is the history of vaccinations and the struggle to protect people from infectious disease. Beginning with smallpox-perhaps humankind's greatest affliction to date-and concluding with an overview of the COVID-19 pandemic, Brown traces the evolution of vaccines and examines deadly diseases...

Junior Library Guild selection How long does it take for science to find an answer to a problem? On January 25, 1862, naturalist Charles Darwin received a box of orchids. One flower, the Madagascar star orchid, fascinated him. It had an 11.5" nectary, the place where flowers make nectar, the sweet liquid that insects and birds eat. How, he wondered, did insects pollinate the orchid? It took 130 years to find the answer. After experiments, he made...

The Call of the Wild, by Jack London, is one of America's best-known novels. In his Reader's Companion to this new edition, Daniel Dyer provides a wealth of annotations explaining the book's many "sourdough" expressions and geographical references in order to help the modern reader see what London saw. Dyer also identifies characters in the novel - human and canine alike - whom London had known, and he spices his annotations with Northern lore and...

A biography of a self-taught scientist who photographed thousands of individual snowflakes in order to study their unique formations.

"Newbery-Honor winning author Joyce Sidman explores the extraordinary life and scientific discoveries of Maria Merian, who discovered the truth about metamorphosis and documented the science behind the mystery in this visual biography that features many original paintings by Maria herself."--