"A trio of time-travelers land in Philadelphia's brutal totalitarian state of 2118. This 1919 classic was the first alternate-world fantasy, and H. P. Lovecraft hailed its author as among "the top grade of writers." Loaded with action and humor, the novel anticipates the work of Philip K. Dick. "A much-sought rarity." -- Analog"--

Tor Essentials presents new editions of science fiction and fantasy titles of proven merit and lasting value, each volume introduced by an appropriate literary figure. Far from Earth, two sister planets, Saint Anne and Saint Croix, circle each other in an eternal dance. It is said a race of shapeshifters once lived here, only to perish when men came. But one man believes they can still be found, somewhere in back of the beyond. In The Fifth Head of Cerberus, Gene Wolfe skillfully interweaves three bizarre tales to create a mesmerizing pattern: the harrowing account of the son of a mad genius who discovers his hideous heritage; a young man's mythic dreamquest for his darker half; and the bizarre chronicle of a scientist's nightmarish imprisonment. Like an intricate, braided knot, the pattern at last unfolds to reveal astonishing truths about this strange and savage alien landscape. With a new introduction by O. Henry Award winning author Brian Evenson At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.

What would you do if inhaling a mysterious dust transports you to a future totalitarian Philadelphia in 2118 AD where you are face to face with the mythical and ferocious three headed dog Cerberus? Who will succeed in killing you first – the government or the beast? Find out for yourself in this dystopian sci-fi classic! Gertrude Barrows Bennett (1883–1948) was the first major female writer of fantasy and science fiction in the United States, publishing her stories under the pseudonym Francis Stevens. Bennett wrote a number of highly acclaimed fantasies between 1917 and 1923 and has been called "the woman who invented dark fantasy."

Kerberos, the single sign-on authentication system originally developed at MIT, deserves its name. It's a faithful watchdog that keeps intruders out of your networks. But it has been equally fierce to system administrators, for whom the complexity of Kerberos is legendary. Single sign-on is the holy grail of network administration, and Kerberos is the only game in town. Microsoft, by integrating Kerberos into Active Directory in Windows 2000 and 2003, has extended the reach of Kerberos to all networks large or small. Kerberos makes your network more secure and more convenient for users by providing a single authentication system that works across the entire network. One username; one password; one login is all you need. Fortunately, help for administrators is on the way. Kerberos: The Definitive Guide shows you how to implement Kerberos for secure authentication. In addition to covering the basic principles behind cryptographic authentication, it covers everything from basic installation to advanced topics like cross-realm authentication, defending against attacks on Kerberos, and troubleshooting. In addition to covering Microsoft's Active Directory implementation, Kerberos: The Definitive Guide covers both major implementations of Kerberos for Unix and Linux: MIT and Heimdal. It shows you how to set up Mac OS X as a Kerberos client. The book also covers both versions of the Kerberos protocol that are still in use: Kerberos 4 (now obsolete) and Kerberos 5, paying special attention to the integration between the different protocols, and between Unix and Windows implementations. If you've been avoiding Kerberos because it's confusing and poorly documented, it's time to get on board! This book shows you how to put Kerberos authentication to work on your Windows and Unix systems.

Recounts the Greek myth about the three-headed dog who was employed to guard the portals of the Underworld.

Poppy is nothing special. She was making ends meet and trying to enjoy life. But a strange necklace caught her eye at the thrift store. Now, three gorgeous men have stumbled into her life, and she's torn between being terrified and excited. That is until they tell her she is the future queen of the Underworld. Not only that, but she needs to bond with her hellhounds, the three heads of Cerberus, and protect the Underworld from a goddess who wants it for herself. Forced to face unnatural enemies, and too-sexy-for-their-own-good men, Poppy must choose: keep the life she's always had or take her rightful place as queen. If she survives.

Nolan Garrett is Cerberus. A government assassin, tasked with fixing the galaxy's darkest, ugliest problems with a bullet to the brain. Armed with cutting-edge weapons and an AI-run cybernetic suit that controls his paralyzed legs, he is the fist in the shadows, the dagger to the heart of the Nyzarian Empire's enemies.Then he found Bex on his doorstep...A junkie, high on the drug he'd fought for years to avoid, and a former elite soldier like him. So he takes her in to help her get clean-Silverguards never leave their own behind.If only he'd known his actions would put him in the crosshairs of the most powerful cartel in New Avalon.Facing an army of gangbangers, drug pushers, and thugs, Nolan must fight to not only carry out his mission, but to prevent the escalating violence from destroying everything he loves.Cerberus: Assassination Protocol is the riveting, heart-pounding first book in the epic military sci-fi Cerberus series. If you like fearless heroes, non-stop futuristic action, and neck-breaking plot twists, you'll love Andy Peloquin's thrilling space opera series.Buy Cerberus: Assassination Protocol now to watch an assassin fight to protect the innocent!

The Citadel of Fear, an anthology showcasing the work of Gertrude Barrows Bennett, who wrote under the pseudonym Francis Stevens, is a cornerstone in the foundation of science fiction literature. Within its pages, readers will discover an array of speculative narratives that transcend time and space, weaving together elements of fantasy, horror, and early science fiction. The collection encapsulates the diverse and groundbreaking storytelling techniques of its era, offering a splendid display of Stevens' pioneering imagination and mastery over the speculative. Its standout pieces not only explore the unknown but also delve into the complexities of human emotion and the interplay between fear and curiosity, making it a significant contribution to the genre's evolution. The authors behind these narratives, particularly Stevens, are considered trailblazers in science fiction. Bennett, an unsung heroine of her time, effectively laid the groundwork for future generations of writers within these genres. Through her unique lens, readers are offered a glimpse into the early 20th century's burgeoning fascination with the speculative and the fantastic. The anthology aligns with pivotal moments in literary history, where the boundaries of reality are pushed, and new worlds are conceived, cementing its place within the pantheon of science fiction classics. This collection is recommended for those intrigued by the roots of science fiction and the remarkable breadth of themes it encompasses. It offers a unique opportunity to experience the visionary work of Gertrude Barrows Bennett, whose contributions have significantly shaped the landscape of speculative fiction. The Citadel of Fear serves not only as a portal to imaginative realms but also as a critical resource for understanding the evolution of science fiction. Readers, scholars, and enthusiasts alike will find value in this anthology, for it fosters a greater appreciation of the genre's complexities and the diverse perspectives that have contributed to its enduring legacy.

Claimed opens with the recovery of a mysterious artifact, a strange box bearing an undecipherable inscription, from an uncharted island following an undersea volcanic explosion that nearly dooms the ship that discovers it. Brought back to civilization, the box is purchased by a crotchety old millionaire who quickly comes to regret it. Horrible apparitions of the sea appear at night and frightening dreams plague the old man, his niece and the young doctor who's serving him. While the doctor does what he can to learn of the box's origin and the meaning of the strange writing, the nonstop macabre visions, and occasional deaths, that have appeared in the box's wake eventually lead to the abduction of the old man and his niece by persons unknown. In pursuit of his employer across the high seas, the doctor learns of the box's evil origins from the mad sailor who originally found it. ""One of the strangest and most compelling science fantasy novels you will ever read""