From Saturday April 20th to Tuesday April 23rd, the Kindle edition of The High Frontier is absolutely free. Just open the Kindle app on your iOS, Android, Windows PC or Mac and type High Frontier in the Kindle store, or get your free Kindle edition directly from the Amazon.com website at http://www.amazon.com/The-High-Frontier-ebook/dp/B00CB3SIAI/ .
The High Frontier was a milestone in the work to make the dream of Space Settlement real for everyone. So many lives were changed by this book. Now a new digital generation can learn the needs, the goals and the potentials that Professor O’Neill made so clearly understandable.