We are pleased to announce that ALL of our Amazon eBooks will be available FREE for 4 days during the extended Memorial Day Weekend. The promotion is for Friday-Monday includive - Fri, May 26 to Mon. May 29. Please help us spread the word so we can help educate the public in regards to Aerial Robotics. http://amzn.to/1TDK70X (Getting Started with Hobby Quadcopters and Drones) http://amzn.to/249z532 (Buying and Flying the DJI Phantom 3) http://amzn.to/1TDKNTL (older Phantom book - outdated, but still some good info) http://amzn.to/1WmOQnV (My Author Page with all three books listed) The older Phantom book is also available FREE on Smashword - where you can get it in various formats including PDF. https://www.smashwords.com/books/view/587155