Has anyone ever read this book? It's Scifi, so it may be a bit off for some folks...but its one of the only 600+ page books I've read 3 times. The basis of the book is an alien invasion of Earth... but the thing that got me is the math that the aliens used to calculate the invasion and why they used that theorem. Very interesting, and Larry Niven is a notable writer. It'd make a fine movie if done correctly. ISBN 0345323440
I read Footfall years ago. It's a good story. It would make a nice film, but having it done correctly might prove difficult.