Larry Niven
1) Ringworld
Winner of both the Hugo and Nebula Awards for Best Novel, Ringworld remains a favorite among science fiction readers.
The artifact is a vast circular ribbon of matter, some 180 million miles across, with a sun at its center. Pierson's puppeteers—strange, three-legged, two-headed aliens—discovered this "Ringworld" in a hitherto unexplored part of the galaxy. Curious about the immense structure, but frightened by the prospect of
...2) Rainbow Mars
16) Lucifer's hammer
BOOK ONE IN THE CLASSIC HEOROT SERIES FROM GENRE LEGENDS LARRY NIVEN, JERRY POURNELLE, AND STEVEN BARNES
The two hundred colonists on board the Geographic have spent a century in cold sleep to arrive here: Avalon, a lush, verdant planet lightyears from Earth. They hope to establish a permanent colony, and Avalon seems the perfect place. And so they set about planting and building.
But their very presence has upset the ecology
...BOOK TWO IN THE CLASSIC HEOROT SERIES FROM GENRE LEGENDS LARRY NIVEN, JERRY POURNELLE, AND STEVEN BARNES.
Some twenty years have passed since the passengers and crew of the starship Geographic established a colony on the hostile alien world of Avalon. In that time, a new generation has grown up in the peace and serenity of the island paradise of Camelot, ignorant of the Great Grendel Wars fought between their parents and grandparents
...