In recent years, the grappling arts have proven to be the most effective form of combat in mixed martial arts (MMA) and no-holds-barred (NHB) competitions. Above all others, the Gracie brand of Brazilian jujitsu has become recognized as the preeminent fighting style in unarmed combat. Now Renzo Gracie--instructor; competitor; and champion of numerous grappling, MMA, and NHB events--reveals the inner workings of the art in his latest book, "Mastering Jujitsu."

From the origins of the art to personal techniques, you will experience the impact the Gracies have had on jujitsu and learn the strategies they have developed to dominate their opponents. Gracie shares the subtleties of the techniques necessary for mastering the art, and he clearly demonstrates the flow of movement with more than 250 high-quality photos.

Not only will "Mastering Jujitsu" help you progress from isolated skill development techniques to a full set of tactics and fight plans, but it will also introduce you to the concept of combat phases and teach you to attack from any phase. You will learn how to react to your opponent in any situation. Whether you're caught in a bottom position or attacking from the top, Gracie reveals the key strategies designed to give you the upper hand.

The depth and breadth of topics covered in "Mastering Jujitsu" will aid even the most experienced black belts in their understanding and execution of Brazilian jujitsu. With detailed coverage on advanced principles, you will get all the tactics, strategies, techniques, and drills you need for close combat fighting.

A concise but informative overview of AI ethics and policy. Artificial intelligence, or AI for short, has generated a staggering amount of hype in the past several years. Is it the game-changer it's been cracked up to be? If so, how is it changing the game? How is it likely to affect us as customers, tenants, aspiring home-owners, students, educators, patients, clients, prison inmates, members of ethnic and sexual minorities, voters in liberal democracies? This book offers a concise overview of moral, political, legal and economic implications of AI. It covers the basics of AI's latest permutation, machine learning, and considers issues including transparency, bias, liability, privacy, and regulation.

Automating technologies threaten to usher in a workless future. But this can be a good thing-if we play our cards right. Human obsolescence is imminent. The factories of the future will be dark, staffed by armies of tireless robots. The hospitals of the future will have fewer doctors, depending instead on cloud-based AI to diagnose patients and recommend treatments. The homes of the future will anticipate our wants and needs and provide all the entertainment, food, and distraction we could ever desire. To many, this is a depressing prognosis, an image of civilization replaced by its machines. But what if an automated future is something to be welcomed rather than feared? Work is a source of misery and oppression for most people, so shouldn't we do what we can to hasten its demise? Automation and Utopia makes the case for a world in which, free from need or want, we can spend our time inventing and playing games and exploring virtual realities that are more deeply engaging and absorbing than any we have experienced before, allowing us to achieve idealized forms of human flourishing. The idea that we should "give up" and retreat to the virtual may seem shocking, even distasteful. But John Danaher urges us to embrace the possibilities of this new existence. The rise of automating technologies presents a utopian moment for humankind, providing both the motive and the means to build a better future.