This is book number 1 in the Heorot series.
Bestselling science fiction superstars Larry Niven and Jerry Pournelle combine their talents with those of Steven Barnes in an extraordinary adventure of humankind's first outpost in the farthest reaches of space.
Light years from Earth, colonists land on a planet they name Avalon. It seems like a paradise-until native creatures savagely attack. It will take every bit of intelligence, courage, and military-style discipline to survive.