My books are exclusive to Amazon, so if you have a Kindle, perfect! If you don't, then you can get the Kindle app for your smartphone, and it's always free. Download it from Google play or the i-store, and you're good to go. This means that it will be all free, so there's no excuse not to read "Cold"!
You should be able to purchase and download it to your computer as a pdf as well. Find it here: Cold On your Kindle, or app, you will have to search for H.A. Larson. I hope you enjoy it, and look for "The Melody" coming out next week!