Onslaught from Rigel is an exciting science fiction novel that explores the possibility of an alien invasion. The story follows the human race as it faces a wave of attacks from extraterrestrial beings. The novel is full of suspense and action, and it features a cast of well-developed characters. Pratt's writing is clear and concise, and he does an excellent job of building tension and suspense. Onslaught from Rigel is a must-read for fans of science fiction and adventure.