This book contains scores of intriguing puzzles and paradoxes from Lewis Carroll, the author of Alice in Wonderland, whose interests ranged from inventing new games like Arithmetical Croquet to important problems in symbolic logic and propositional calculus. Written by Carroll expert and well-known mathematics author Martin Gardner, this tour through Carroll's inventions is both fun and informative.

First published in 1889, this novel has two main plots; one set in the real world at the time the book was published (the Victorian era), the other in the fictional world of Fairyland.

"Chris Grabenstein just might be the smartest writer for kids in the universe." --James Patterson What if you could learn everything just by eating jellybeans?! Meet the Smartest Kid in the Universe and find out in this fun-packed new series from the Bestselling Author of Escape from Mr. Lemoncello's Library and coauthor of Max Einstein! 12 year old Jake's middle school is about to be shut down--unless Jake and his friends can figure out how to save it. When Jake spies a bowl of jellybeans at the hotel where his mom works, he eats them. But those weren't just jellybeans, one of the scientists at his mom's conference is developing the world's first ingestible information pills. And THAT'S what Jake ate. Before long, Jake is the smartest kid in the universe. But the pills haven't been tested yet. And when word gets out about this new genius, people want him. The government. The mega corporations. Not all of them are good people! Can Jake navigate the ins and outs of his newfound geniusdom (not to mention the ins and outs of middle school) and use his smarts to save his school? BONUS! Includes extra brainteasers to test your smarts! Don't miss the next Smartest Kid in the Universe—Genius Camp!

Starting with the analysis of cognitive situations which appear in everyday life, and by means of the logical analysis of some games, the author deals with applied logic in the sense of the general methodology of reasoning. The book acquaints the reader with some forms and operations of reasoning which are applied in the process of scientific cognition as well as in daily activities that require thought. As opposed to a number of well-known and unique handbooks and text-books on pure logic this books conveys learning, and in many cases original thoughts, through witty dialogues, in an entertaining way.

Acclaimed by Einstein himself, this is among the clearest, most readable expositions of relativity theory. It explains the problems Einstein faced, the experiments that led to his theories, and what his findings reveal about the forces that govern the universe. 1957 edition.

e-artnow presents to you this meticulously edited and formatted SF collection, jam-packed with the dystopian worlds, intergalactic action-adventures, and the greatest Sci-Fi classics: E. M. Forster: The Machine Stops Richard Jefferies: After London Richard Stockham: Perchance to Dream Irving E. Cox: The Guardians Philip F. Nowlan: Armageddon–2419 A.D… George Griffith: The Angel of the Revolution… Percy Greg: Across the Zodiac David Lindsay: A Voyage to Arcturus Edward E. Hale: The Brick Moon Stanley G. Weinbaum: A Martian Odyssey… Abraham Merritt The Moon Pool… Edgar Wallace: The Green Rust… H. Beam Piper: Terro-Human Future History… Garrett P. Serviss: The Sky Pirate… Philip K. Dick: Second Variety… Jules Verne: Journey to the Center of the Earth H. G. Wells: The Time Machine Edgar Allan Poe: A Descent into the Maelstrom… Mary Shelley: Frankenstein… Edwin A. Abbott: Flatland Jack London: Iron Heel… R. L. Stevenson: Dr Jekyll and Mr Hyde George MacDonald: Lilith H. Rider Haggard: King Solomon's Mines She William H. Hodgson: The Night Land… Edward Bellamy: Looking Backward… Mark Twain: A Connecticut Yankee in King Arthur's Court Arthur Conan Doyle: The Lost World… Edgar Rice Burroughs Pellucidar Series Caspak Series Francis Bacon: New Atlantis C. J. Cutcliffe Hyne: The Lost Continent Margaret Cavendish: The Blazing World Jonathan Swift: Gulliver's Travels William Morris: News from Nowhere Samuel Butler: Erewhon Edward Bulwer-Lytton: The Coming Race James F. Cooper: The Monikins Charlotte P. Gilman: Herland Ayn Rand: Anthem Owen Gregory: Meccania the Super-State Hugh Benson: Lord of the World Fred M. White: The Doom of London Ignatius Donnelly: Caesar's Column Ernest Bramah: The Secret of the League Milo Hastings: City of Endless Night Arthur D. Vinton: Looking Further Backward Robert Cromie: The Crack of Doom Gertrude Bennett: The Heads of Cerberus E. E. Smith: Triplanetary… Murray Leinster: Murder Madness… Fritz Leiber: The Big Time… Andre Norton: The Time Traders… Pursuit A Traveler in Time Gulliver of Mars A Journey in Other Worlds…