This is an excerpt from the eBook "Crush it with Kindle" by John Tighe
"Kindle was launched in November 2007. However, despite these numbers not everyone owns a Kindle. This is something that Amazon has addressed by giving away the free Kindle app to anyone who wants it. The Kindle app allows any desktop computer , laptop computer, tablet or smart phone to be used as a Kindle reader. It works on any platform – Mac or PC, iPad or Android . It means that there are an estimated 5 billion plus Kindle ready devices in the world!"
You can purchase his full eBook at
http://www.amazon.com/Crush-Kindle-Self-Publish-Promote-Bestseller-ebook/dp/B00AQLFB2K/ref=sr_1_1?ie=UTF8&qid=1440338186&sr=8-1&keywords=crush+it+with+kindle