James Ward, of dual personality, behaves "like a civilized man in the morning" and yet changes at night into "a savage and a barbarian living under the primitive conditions of several thousand years before." What is the reason of his schizophrenia and how will he manage his life? The Eternity of Forms falsifies "the eternity of the forms of things" by a short psychological story somewhat obscurely told in the manuscript of Mr. Sedley Crayden. Why a scientific wizard and a man of tremendous intellect should grow into an arch-enemy of mankind? The Enemy of All the World offers a reason. The Benefit of the Doubt is an attack on the corrupt American judicial system. Through the narrative of a medical assistant, Told in the Drooling Ward discloses the inhumane reality of London's time. In Good-Bye, Jack!, we see a "queer thing" occurring in the "queer" Hawaii.

白天他是个温文尔雅的律师，形象阳光；黑夜却让他变成洪水猛兽，野性萌发。《当世界年轻的时候》为我们讲诉一个人格分裂的故事。《形体的永恒》笔法简练清晰，描写了主人公思维过程的曲折离奇，是心理描写的上乘佳作。《世界公敌》揭示了社会环境对人性格塑造的巨大影响。在《疑犯从宽》里，杰克·伦敦以美国式的幽默写法，描述了一个社会学家在受到无缘故的殴打后，又在法庭上被冤判，心怀愤恨，而后借机将他所遭遇的一切在审判他的法官身上重演......《在流口水病房里讲的故事》发生在一所弱智医院。通过助手汤姆的所见所闻，读者能看到那个时代的凄冷人情。小说《再见，杰克！》直到结尾才揭露出一个外表热情、内心虚伪的夏威夷岛传教士。