《荒野的呼唤》和《白牙》是杰克·伦敦卓越的长篇杰作，也是杰克·伦敦的创作中一直颇受读者钟爱的两部。两部作品虽以动物为题材，但其中却透露出作者所秉持的“弱肉强食、适者生存”的观念。早年，杰克·伦敦在加拿大克朗代克一带的淘金经历以及所见所闻为他日后的创作提供了丰富的素材，从而也使他的作品深处始终涌动着一股强悍、不屈的生命力。

《荒野的呼唤》和《白牙》是杰克·伦敦卓越的长篇杰作，也是杰克·伦敦的创作中一直颇受读者钟爱的两部。前者描写出生于富贵人家的大狗巴克被盗卖到北方的阿拉斯加，历经磨难，最后，留存在巴克身上的原始野性逐渐被唤醒，从而斩断与人类的纠葛，复归于荒野。《白牙》仿佛是前者的倒影，描写一只有一半狗性的狼白牙落入人的手中，主人用它斗狗赚钱，白牙在一次次的搏杀中泯灭了最后一丝温情，对整令人类产生了强烈的仇恨。后来，白牙在搏斗中几乎丧命，被新的主人收留，并在这位仁慈的主人的训练下逐渐克服野性，成为忠实的宠物。

两部作品虽以动物为题材，但其中却透露出作者所秉持的“弱肉强食、适者生存”的观念。早年，杰克·伦敦在加拿大克朗代克一带的淘金经历以及所见所闻为他日后的创作提供了丰富的素材，从而也使他的作品深处始终涌动着一股强悍、不屈的生命力。

Book I THE CALL OF THE WILD

　CHAPTER I INTO THE PRIMITIVE

　CHAPTER II THE LAW OF CLUB AND FANG

　CHAPTER Ill THE DOMINANT PRIMORDIAL BEAST

　CHAPTER IV WHO HAS WON TO MASTERSHIP

　CHAPTER V THE TOIL OF TRACE AND TRAIL

　CHAPTER VI FOR THE LOVE OF A MAN

　CHAPTER VII THE SOUNDING OF THE CALL

Book 2 WHITE FANG

　PART I

　　CHAPTER I THE TRAIL OF THE MEAT

　　CHAPTER II THE SHE-WOLF

　　CHAPTER III THE HUNGER CRY

　PART II

　　CHAPTER I THE BATTLE OF THE FANG

　　 CHAPTER II THE LAIR

　　CHAPTER III THE GRAY CUB

　　CHAPTER IV THE WALL OF THE WORLD

　　CHAPTER V THE LAW OF MEAT

　PART III

　　 CHAPTER I THE MAKERS OF FIRE

　　CHAPTER II THE BONDAGE

　　CHAPTER III THE OUTCAST

　　CHAPTER IV THE TRAIL OF THE GODS

　　CHAPTER V THE COVENANT

　　CHAPTER VI THE FAMINE

　PART IV

　　CHAPTER I THE ENEMY OF HIS KIND

　　CHAPTER lI THE MAD GOD

　　CHAPTER III THE REIGN OF HATE

　　CHAPTER IV THE CLINGING DEATH

　　CHAPTER V THE INDOMITABLE

　　CHAPTER VI THE LOVE-MASTER

　PART V

　　CHAPTER 1 THE LONG TRAIL

　　CHAPTER II THE SOUTHLAND

　　CHAPTER III THE GOD'S DOMAIN

　　CHAPTER IV THE CALL OF KIND

　　CHAPTER V THE SLEEPING WOLF

 And over this great demense Buck ruled. Here he was born,and here he had lived the four years of his life. It was true.there were other dogs. There could not but be other dogs onso vast a place, but they did not count, They came and went.resided in the populous kennels, or lived obscurely in therecesses of the house after the fashion of Toots, the Japanesepug, or Ysabel, the Mexican hairless--strange creaturesthat rarely put nose out of doors or set foot to ground. Onthe other hand, there were the fox terriers, a score of themat least, who yelped fearful promises at Toots and Ysabellooking out of the windows at them and protected by alegion of housemaids armed with brooms and mops.

 But Buck was neither house-dog nor kennel dog. Thewhole realm was his. He plunged into the swimming tankor went hunting with the Judge's sons; he escorted Mollieand Alice. the Judge's daughters, on long twilight or earlymorning rambles; on wintry nights he lay at the Judge'sfeet before the roaring library fire; he carried the Judge'sgrandsons on his back. or rolled them in the grass, andguarded their footsteps through wild adventures down tothe fountain in the stable yard. and even beyond, where thepaddocks were, and the berry patches. Among the terriershe stalked imperiously, and Toots and Ysabel he utterlyignored. for he was king--king over all creeping. crawling,flying things of Judge Miller's place, humans included.

 His father. Elmo, a huge St. Bernard, had been the Judge'sinseparable companion. and Buck bid fair to follow in theway of his father. He was not so large--he weighed onlyone hundred and forty pounds--for his mother, Shep, hadbeen a Scotch shepherd dog. Nevertheless, one hundred andforty pounds, to which was added the dignity that comesof good living and universal respect. enabled him to carryhimself in right royal fashion. During the four years sincehis puppyhood he had lived the life of a sated aristocrat;he had a fine pride in himself, was ever a trifle egotistical.as country gentlemen sometimes become because of theirinsular situation. But he had saved himself by not becominga mere pampered house dog. Hunting and kindred outdoordelights had kept down the fat and hardened his muscles;and to him, as to the cold tubbing-races, the love of waterhad been a tonic and a health preserver.

  And this was the manner of dog Buck was in the fall of1897, when the Klondike strike dragged men from all theworld into the frozen North. But Buck did not read thenewspapers. and he did not know that Manuel, one of thegardener's helpers, was an undesirable acquaintance. Manuelhad one besetting sin. He loved to play Chinese lottery. Also,in his gambling. he had one besetting weakness-faith ina system. and this made his damnation certain. For to playa system requires money, while the wages of a gardener'shelper do not lap over the needs of a wife and numerousprogeny.