This is Larry Niven's Mastered Space. The history of the distant future, written down to the smallest detail. The story of distant planets, inhabited by billions of earthlings and representatives of the most incredible alien races - kzinti and puppeteers, kdatlinos and trinoks. However, the true “pearl” of Mastered Space is the Ring World. The most unique artifact in the entire history of world SF - and, according to Larry Niven, the most amazing work of engineering art since Dante's Divine Comedy. An artificially created “hoop” around the distant sun is tens of meters thick, millions of kilometers wide and billions in diameter. “Hoop”, the inside of which can accommodate trillions of inhabitants. “The Hoop”, which again and again becomes an “arena” for wars, expansions and incredible, exciting adventures, Welcome to Larry Niven’s Mastered Space!