Trajectory presents classics of world literature with 21st century features! Our original-text editions include the following visual enhancements to foster a deeper understanding of the work: Word Clouds at the start of each chapter highlight important words. Word, sentence, paragraph counts, and reading time help readers and teachers determine chapter complexity. Co-occurrence graphs depict character-to-character interactions as well character to place interactions. Sentiment indexes identify positive and negative trends in mood within each chapter. Frequency graphs help display the impact this book has had on popular culture since its original date of publication. Use Trajectory analytics to deepen comprehension, to provide a focus for discussions and writing assignments, and to engage new readers with some of the greatest stories ever told. The Call of the Wild is a novel by American author Jack London published in 1903. The story is set in the Yukon during the 1890s Klondike Gold Rush period when strong sled dogs were in high demand. The novel's central character is a dog named Buck, a domesticated dog living at a ranch in California as the story opens. Stolen from his home and sold into the brutal existence of an Alaskan sled dog, he reverts to atavistic traits. Buck is forced to adjust to, and survive, cruel treatments and fight to dominate other dogs in a harsh climate. Eventually he sheds the veneer of civilization, relying on primordial instincts and lessons he learns, to emerge as a leader in the wild. London lived for most of a year in the Yukon collecting material for the book.