2001: A Space Odyssey

I never fully understood the movie. There are long scenes without any explanation, chimps jumping up and down, unusual scenes without context. Reading this book added that context in every case. Any places I was confused or had questions have now been answered. The book is actually really good sci fi - a precursor to Interstellar or Contact I'm more ways than one. Great read by itself, or even better if you want to understand more from the movie.