Robert Louis Stevenson's masterpiece of the duality of good and evil in man's nature sprang from the darkest recesses of his own unconscious—during a nightmare from which his wife awakened him, alerted by his screams. More than a hundred years later, this tale of the mild-mannered Dr. Jekyll and the drug that unleashes his evil, inner persona—the loathsome, twisted Mr. Hyde—has lost none of its ability to shock.

Its realistic police-style narrative chillingly relates Jekyll's desperation as Hyde gains control of his soul—and gives voice to our own fears of the violence and evil within us. Written before Freud's naming of the ego and the id, Stevenson's enduring classic demonstrates a remarkable understanding of the personality's inner conflicts—and remains the irresistibly terrifying stuff of our worst nightmares.

A twentieth-century successor to Edgar Allan Poe as the master of "weird fiction," Howard Philips Lovecraft once wrote, "The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown." In the novellas and stories he published in such pulp magazines as Weird Tales and Astounding Stories—and in the work that remained unpublished until after his death, including some of his best writing—H. P. Lovecraft adapted the conventions of horror stories and science fiction to express an intensely personal vision, cosmic in its ramifications and fearsome in its shuddering view of human destiny.

In this Library of America volume, the best-selling novelist Peter Straub brings together the very best of Lovecraft's fiction in a treasury guaranteed to bring fright and delight both to longtime fans and to readers new to his work. Early stories such as The Outsider, The Music of Erich Zann, Herbert West–Reanimator, and The Lurking Fear demonstrate Lovecraft's uncanny ability to blur the distinction between reality and nightmare, sanity and madness, the human and non-human. The Horror at Red Hook and He reveal the fascination and revulsion Lovecraft felt for New York City; Pickman's Model uncovers the frightening secret behind an artist's work; The Rats in the Walls is a terrifying descent into atavistic horror; and The Colour Out of Space explores the eerie impact of a meteorite on a remote Massachusetts valley.

In such later works as The Call of Cthulhu, The Whisperer in Darkness, At the Mountains of Madness, The Shadow Over Innsmouth, and The Shadow Out of Time, Lovecraft developed his own nightmarish mythology in which encounters with ancient, pitiless extraterrestrial intelligences wreak havoc on hapless humans who only gradually begin to glimpse "terrifying vistas of reality, and our frightful position therein." Moving from old New England towns haunted by occult pasts to Antarctic wastes that disclose appalling secrets, Lovecraft's tales continue to exert a dread fascination.