The Call of the Wild

The Call of the Wild is a 1903 novel by Jack London. The plot revolves around a dog named Buck and how his primal instincts return as he serves as a sled dog in the Yukon during the Klondike gold rush. It's usually considered his best novel, and he followed it with a Spiritual Successor called White Fang, a longer and even darker story about a wolf being domesticated and eventually sent to live in San Francisco. Because the protagonist is a dog, it is often mistaken for a kid's book. The dark tone and gritty violence make it decidedly not. The novel has had a lot of adaptations over the years, usually focusing on the human characters more than the dogs.

These adaptions include:

 * A 1935 version starring Clark Gable and Loretta Young.
 * The 1972 film starring Charles Heston and Mick Steele
 * An anime film adaptation in the 1980's by Toei Animation
 * A different anime adaptation called Anime Yasei no Sakebi (English Anime Cry of Wildness)
 * A 1997 adaptation, The Call of the Wild: Dog of the Yukon starring Rutger Hauer, which was actually fairly faithful to the book.
 * A television series broadcast in 2000.
 * A family-friendly PG-rated film called Call of the Wild in Digital Real-D 3D, which failed at the box office

Tropes used by the book:

 * Berserk Button: The book has a grizzled older sledding dog named Sol-Leks, with one blind eye. Buck, the mutt protagonist of the novel, takes a nasty bite when he approaches Sol-leks from his blind side and is careful never to do it again.
 * God have mercy on your soul if you hurt John Thorton in front of Buck. He will tear you to pieces!
 * Big Badass Wolf
 * Bittersweet Ending
 * Comic Trio: Hall, Charles, and Mercedes. At least, they're comic until their inexperience starts to endanger their lives and those of their dogs. Eventually
 * Death by Newbery Medal:
 * Different As Night and Day: Billee and Joe.
 * Eaten Alive: All dogs that lose a fight.
 * Family-Unfriendly Violence: All over the place.
 * Handicapped Badass: Sol-Leks may be blind in one eye, but that doesn't make him any weaker!
 * Kick the Dog: Starve the dog, shun the dog, bite the dog...
 * Lemony Narrator
 * Mercy Kill: Dogs which are too tired or hurt to work get this treatment.
 * Noble Savage: Buck becomes the canine equivalent of this at the end of the book.
 * Old Shame: Charlton Heston once said that the adaptation he starred in was the worst film he ever did.
 * Roaring Rampage of Revenge: Buck goes on one after.
 * Sacrificial Lamb: Curly.
 * The Power of Love: Buck's relationship with John Thornton.
 * Too Dumb to Live: Hal, Charles, and Mercedes.
 * White-Haired Pretty Boy: Spitz is the canine equivalent of this
 * Xenofiction