From the multiple Hugo and Nebula Award-winning author: "A panoramic story of what happens to a world gone super intelligent" (Astounding Science Fiction). With "wonderfully logical detail . . . exciting storytelling and moving characterization" (Anthony Boucher), science fiction master Poul Anderson explores what happens when the next stage of evolution is thrust upon humanity and animals. As Earth passes out of a magnetic field that has suppressed intelligence for eons, the mental capacity for all mammals increases exponentially, radically changing the structures of society. A mentally impaired farm worker finds himself capable of more delicate and intelligent thoughts than he ever dreamed. A young boy on holiday manages to discern the foundations of calculus before breakfast. Animals that were seen as livestock and pets can now communicate clearly with their owners and one another. And an already brilliant physics researcher now uses his boundless intellect to bring humankind to the stars--even as his wife plunges into an existential crisis. For all of them, the world will never be the same . . .

This Hugo Award finalist, "justifiably regarded as a classic" (SFReviews.net), is the tale of an epic space voyage where time dilation goes horribly wrong. Aboard the spacecraft Leonora Christine, fifty crewmembers, half men and half women, have embarked on a journey of discovery like no other to a planet thirty light-years away. Since their ship is not capable of traveling faster than light, the crew will be subject to the effects of time dilation and relativity. They will age five years on board the ship before reaching their destination, but thirty-three years will pass on Earth. Experienced scientists and researchers, they have come to terms with the time conditions of their space travel. Until . . . the Leonora Christine passes through an uncharted nebula, which damages the engine, making it impossible to decelerate the ship on the second half of their trip. To survive, the crewmembers have no choice but to bypass their destination and continue to accelerate toward the speed of light. But how will they keep hope alive and maintain order as they hurtle deeper into space with time passing more and more rapidly, and their ultimate fate unknown? With its combination of mind-blowing hard science and compelling human drama, Tau Zero is "the ultimate hard science novel" (Mike Resnick).

Transported to a medieval realm of magic and myth, a World War II resistance fighter undertakes a perilous quest in this classic fantasy adventure. Holger Carlsen is a rational man of science. A Danish engineer working with the Resistance to defeat the Nazis, he is wounded during an engagement with the enemy and awakens in an unfamiliar parallel universe where the forces of Law are locked in eternal combat with the forces of Chaos. Against a medieval backdrop, brave knights must take up arms against magical creatures of myth and faerie, battling dragons, trolls, werewolves, and giants. Though Holger has no recollection of this world, he discovers he is already well-known throughout the lands, a hero revered as a Champion of Law. He finds weaponry and armor awaiting him--precisely fitted to his form--and a shield with three hearts and three lions emblazoned upon it. As he journeys through a realm filled with wonders in search of the key to his past, Holger will call upon the scientific knowledge of his home dimension, the destinies of both worlds hanging in the balance. Before Thomas Covenant, Roger Zelazny's Amber, and J. R. R. Tolkien's The Lord of the Rings, the great Poul Anderson introduced readers to the Middle World and the legendary hero Ogier the Dane. Inventive and exciting, Three Hearts and Three Lions is a foray into fantasy that employs touches of science fiction from an award-winning master of the speculative.

When a human thinks he's Napoleon Bonaparte, it's time to get out a straightjacket. But when a Hoka thinks he's Napoleon Bonaparte, you'd better believe it! Particularly since there'll be hundreds of other Hokas around who know for a fact that they're the

Fifty men and women set out in the twenty-third century from Earth aboard an interstellar craft to travel to a planet some thirty light-years away. The ship will approach the speed of light and so (as Einstein predicted) subjective time on board will slow and so the journey of several decades will be of much shorter duration for the crew. But the ship's deceleration system is irreparably damaged when it hits a cloud of interstellar dust and acceleration continues toward light speed, tau zero. Soon the ship is speeding through galaxies and eons are passing on board the ship in the blink of an eye ...

The sword Tyrfing has been broken to prevent it striking at the roots of Yggdrasil, the great tree that binds earth, heaven and hell together ... But now the mighty sword is needed again to save the elves, who are heavily involved in their war against the trolls, and only Skafloc, a human child kidnapped and raised by the elves, can hope to persuade the mighty ice-giant, Bolverk, to make the sword Thor broke whole again. But things are never easy, and along the way Skafloc must also confront his shadow self, Valgard the changeling, who took his place in the world of men. A superb dark fantasy of the highest, and most Norse, order. THE BROKEN SWORD is a fantasy masterpiece.