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...

A New York Times bestselling mathematician reveals how math can take your game playing and puzzle solving to the next level.Imagine entering a bingo parlor where one thousand cards are in play. “I’ll bet that the winning card is horizontal instead of vertical,” a man says. Should you take the bet? Or suppose you’ve reached Final Jeopardy! with $7,000 to your opponents’ $8,000 and $4,000. What should you wager?Or im...

Did you know that it's easier to add and subtract from left to right, rather than the other way round? And that you can be taught to square a three-digit number in seconds?In Think Like A Maths Genius, two mathematicians offer tips and tricks for doing tricky maths the easy way. With their help, you can learn how to perform lightning calculations in your head, discover methods of incredible memorisation and other feats of mental agility.Learn maths secrets for the ...

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...

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...

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...

This early work by Arthur Benjamin Reeve was originally published in 1912 and we are now republishing it with a brand new biography. "The Campaign Grafter" tells a story of Kennedy coming to the aid of a troubled politician due to an incriminating photograph. 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 not destined to be in the fiel...

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 Seismograph Adventure," has detective Craig Kennedy explore the spirit world via a seismograph to help a wealthy man contact his late wife's spirit. 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 c...

This early work by Arthur Benjamin Reeve was originally published in 1912 and we are now republishing it with a brand new introductory biography. In "The Sand-Hog" popular detective Craig Kennedy investigates evil deeds committed during the construction of a tunnel. 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 not destined to be in t...

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 ...

This early work by Arthur Benjamin Reeve was originally published in 1912 and we are now republishing it with a brand new biography. " The White Slave" features Professor Craig Kennedy, who is sometimes referred to as "The American Sherlock Holmes" due to his astounding ability at crime solving and his Watson-like sidekick Walter Jameson, a newspaper reporter. In this book, Kennedy solves another case armed with his knowledge of chemistry and technology. Arthur Benjamin Reeve was born on 1...

This early work by Arthur Benjamin Reeve was originally published in 1912 and we are now republishing it with a brand new biography. "The Germ Of Death" sees Kennedy investigate a case of suspicious deaths, which turn out to be done by a Czarist spy using typhus germs in an early case of bioterrorism. 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, hi...