We found 1 Reddit comments about Footfall. Here are the top ones, ranked by their Reddit score.
Yep, here we go. A book about Alien invasion: https://www.amazon.com/Footfall-Larry-Niven-ebook/dp/B01EKJ4PQ6/ref=sr_1_1?keywords=footfall&qid=1573074872&sr=8-1
Yep, here we go. A book about Alien invasion: https://www.amazon.com/Footfall-Larry-Niven-ebook/dp/B01EKJ4PQ6/ref=sr_1_1?keywords=footfall&qid=1573074872&sr=8-1