As we know, 2001 as a novel/movie was a collaboration between Clarke and Kubrick. Without being similarly handcuffed for the sequel, we get a much more exciting story. Clarke loves to write about the pioneering spirit and endeavour of the human race but he simultaneously captures the sense of wonder and how small and insignificant we are within the vastness of space and time. Clarke is the speculative Galactus of sci-fi writing. Superb book.