|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||8 days ago||27.99||$21.81||You save $6.18|
|Amazon US||13 days ago||22.17||$21.81||You save $0.36|
David Gray is a Forex trader, but when trading platforms began to accept Bitcoins he decided he needed to research this virtual currency. What he found was a lot of confusion, so he decided to put together a book that would explain Bitcoin in a simplified way.