These simple math secrets and tricks will forever change how you look at the world of numbers.Secrets of Mental Math will have you thinking like a math genius in no time. Get ready to amaze your friends—and yourself—with incredible calculations you never thought you could master, as renowned “mathemagician” Arthur Benjamin shares his techniques for lightning-quick calculations and amazing number tricks. This book will teach you to do math in your head fast...

The history, formulas, and most famous puzzles of graph theoryGraph theory goes back several centuries and revolves around the study of graphs—mathematical structures showing relations between objects. With applications in biology, computer science, transportation science, and other areas, graph theory encompasses some of the most beautiful formulas in mathematics—and some of its most famous problems. The Fascinating World of Graph Theory explores the ques...

The world's greatest mental mathematical magician takes us on a spellbinding journey through the wonders of numbers (and more)"Arthur Benjamin . . . joyfully shows you how to make nature's numbers dance." -- Bill Nye (the science guy)The Magic of Math is the math book you wish you had in school. Using a delightful assortment of examples-from ice-cream scoops and poker hands to measuring mountains and making magic squares-this book revels in key mat...

THE CLUTCHING HAND "Jameson, here's a story I wish you'd follow up," remarked the managing editor of the Star to me one evening after I had turned in an assignment of the late afternoon. He handed me a clipping from the evening edition of the Star and I quickly ran my eye over the headline: "THE CLUTCHING HAND" WINS AGAIN NEW YORK'S MYSTERIOUS MASTER CRIMINAL PERFECTS another COUP CITY POLICE COMPLETELY BAFFLED "Here's this murder of Fletcher, the retired banker and trustee of the Universi...

Kennedy's suit-case was lying open on the bed, and he was literally throwing things into it from his chiffonier, as I entered after a hurried trip up-town from the Star office in response to an urgent message from him. "Come, Walter," he cried, hastily stuffing in a package of clean laundry without taking off the wrapping-paper, "I've got your suit-case out. Pack up whatever you can in five minutes. We must take the six o'clock train for Danbridge." I did not wait to hear any more. The mer...

Until I receive those materials from Doctor Leslie to make the poison tests, considered Kennedy, as we walked slowly the few blocks to the laboratory, "I can't see that there is much I can do but wait." In his laboratory, he paused before his well-stocked shelves with their miscellaneous collection of books on almost every conceivable subject. Absently he selected a volume. I could see that it was one of the latest translated treatises on this new psychology from the pen of the eminent sci...

I am not by nature a spy, Professor Kennedy, but—well, sometimes one is forced into something like that." Maude Euston, who had sought out Craig in his laboratory, was a striking girl, not merely because she was pretty or because her gown was modish. Perhaps it was her sincerity and artlessness that made her attractive. She was the daughter of Barry Euston, president of the Continental Express Company, and one could readily see why, aside from the position her father held, she should be am...

I'm so worried over Gloria, Professor Kennedy, that I hardly know what I'm doing." Mrs. Bradford Brackett was one of those stunning women of baffling age of whom there seem to be so many nowadays. One would scarcely have believed that she could be old enough to have a daughter who would worry her very much. Her voice trembled and almost broke as she proceeded with her story, and, looking closer, I saw that, at least now, her face showed marks of anxiety that told on her more than would hav...

As I look back now on the sensational events of the past months since the great European War began, it seems to me as if there had never been a period in Craig Kennedy's life more replete with thrilling adventures than this. In fact, scarcely had one mysterious event been straightened out from the tangled skein, when another, even more baffling, crowded on its very heels. As was to have been expected with us in America, not all of these remarkable experiences grew either directly or indire...

THE VANISHER "Hello, Jameson, is Kennedy in?" I glanced up from the evening papers to encounter the square-jawed, alert face of District Attorney Carton in the doorway of our apartment. "How do you do, Judge?" I exclaimed. "No, but I expect him any second now. Won't you sit down?" The District Attorney dropped, rather wearily I thought, into a chair and looked at his watch

In "The Dream Doctor," Arthur Benjamin Reeve marries the realms of psychological intrigue and investigative mystery, crafting a narrative that invites readers to explore the delicate boundaries of the mind and reality. Set in the early 20th century, a period marked by burgeoning interest in psychology and the unconscious, this novel employs a lively and accessible style, interweaving the scientific principles of Freudian dreams with a captivating plot centered around the enigmatic characte...

This early work by Arthur Benjamin Reeve was originally published in 1912 and we are now republishing it with a brand new introductory biography. "The Steel Door," has detective Craig Kennedy called on by police friend O'Connor to help a mother rescue her son from a crooked gambling club. Arthur Benjamin Reeve was born on 15th October 1880 in New York, USA. Reeve received his University education at Princeton and upon graduating enrolled at the New York Law School. However, his career was ...