At the heart of this short introduction to category theory is the idea of a universal property, important throughout mathematics. After an introductory chapter giving the basic definitions, separate chapters explain three ways of expressing universal properties: via adjoint functors, representable functors, and limits. A final chapter ties all three together. The book is suitable for use in courses or for independent study. Assuming relatively little mathematical background, it is ideal fo...

Vintage Sci-Fi 21 - 24 Science Fiction Classics from Arthur C. Clarke, Robert Silverberg, Michael Shaara, Nelson S. Bond, Jack Williamson and moreFlight Through Tomorrow by Stanton A. CoblentzThe Big Bounce by Walter TevisThe Black Cat by Edgar Allan PoeYou Were Right, Joe by J. T. McIntoshThe Star Beast by Damon KnightThe Madness of Lancelot Biggs by Nelson S. BondSummertime on Icarus by Arthur C. ClarkeSt...

For mystery readers, Michael Bracken brings us an original tale by Eve Fisher—“The Ghost of Eros” features art crime of a most creative sort. Barb Goffman’s presents an action-packed tale by David Hagerty. “A Photo’s Worth” features an actress, a paparazzo, San Francisco, and scancal—a great read. Hal Charles (the writing team of Hal Blythe and Charlie Sweet) brings us another solve-it-yourself mystery. And we have a classic mystery featuring Madame Storey from Hulbert Footner, and a Briti...

When George Abbershaw is invited to Black Dudley Manor for the weekend, he has only one thing on his mind - proposing to Meggie Oliphant. Unfortunately for George, things don't quite go according to plan. A harmless game turns decidedly deadly and suspicions of murder take precedence over matrimony. Trapped in a remote country house with a murderer, George can see no way out. But Albert Campion can.

**The Most Complete Collection of Impossible Crime Stories Ever Assembled, with puzzling mysteries by Stephen King, Dashiell Hammett, Lawrence Block, Agatha Christie, Georges Simenon, Dorothy L. Sayers, P. G. Wodehouse, Erle Stanley Gardner, and many, many moreTHE BLACK LIZARD BIG BOOK OF LOCKED-ROOM MYSTERIES: An empty desert, a lonely ski slope, a gentleman’s study, an elevator car—nowhere is a crime completely impossible.**Edgar Award–winning editor Otto Penzler has coll...

From the founding father of science fiction H.G. Wells, a masterpiece about a man trapped in the terror of his own creation.The Invisible Man inspired The Map of Chaos by New York Times bestselling author Félix J. Palma. As a gift to readers, this ebook edition includes an excerpt from The Map of Chaos.

The 'Murder Mystery - Boxed Set: 800+ Whodunit Mysteries, True Crime Stories & Action Thrillers' stands as a monumental anthology that spans a broad spectrum of the genre, encapsulating the evolution and diversity of mystery writing from the classic detective tales of the 19th century to the intricate plots of the early 20th century. This collection showcases a rich variety of literary styles and thematic undertakings, bringing together some of the genre's most compelling narratives withou...

90 CRIME NOVELS: Complete Collection gathers Edgar Wallace's prodigious crime fiction into a panorama of early twentieth-century suspense, ranging from police investigations and courtroom intrigue to secret societies, jewel thefts, blackmail, and international conspiracies. Wallace's style is swift, theatrical, and intensely plot-driven: chapters often turn on revelations, disguises, and reversals rather than psychological introspection. Situated between Victorian sensation fiction and the...

In The Goodbye Look, Lew Archer is hired to investigate a burglary at the mission-style mansion of Irene and Larry Chalmers. The prime suspect, their son Nick, has a talent for disappearing, and the Chalmerses are a family with money and memories to burn. As Archer zeros in on Nick, he discovers a troubled blonde, a stash of wartime letters, a mysterious hobo. Then a stiff turns up in a car on an empty beach. And Nick turns up with a Colt .45. In The Goodbye Look

Over a thousand pages of haunted—and haunting—ghost tales: the most complete collection of uncanny, spooky, creepy tales ever published! Edited and with an introduction by Otto Penzler. Including stories by Joyce Carol Oates, Rudyanrd Kipling, Isaac Asimov, James MacCreigh, and many more! Featuring eerie vintage ghost illustrations.The ghost story is perhaps the oldest of all the supernatural literary genres and has captured the imagination of almost every writer t...

Enjoy solving crime and puzzles with this meticulously edited mystery collection: Arthur Conan Doyle: Complete Sherlock Holmes Series True Crime Stories G. K. Chesterton: Father Brown Edgar Wallace: Four Just Men Mr. J. G. Reeder Detective Sgt. Elk The Earl of Nowhere P.-C. Lee Wilkie Collins: The Woman in White Armadale… Edgar Allan Poe: The Murders in the Rue Morgue The Mystery of Marie Roget The Purloined Letter The Gold Bug Thou Art the Man Louis Tracy: Detectives White & Furneaux Myst...

Welcome to another wide-ranging collection of dark fantasy and horror stories. From familiar classics to rare pulp stories, from the Victorian era to contemporary tales, there's something here for every taste. Included are:GARAGE SALE, by Janet FoxSOULS OF THE DAMNED, by John D. SwainJOHNNY ON THE SPOT, by Frank Belknap LongTHE HAUNTED CHAIR, by Richard MarshTHE UPPER BERTH, by F. Marion CrawfordA BIT OF THE DARK WORLD, by Fritz LeiberTHURN...