If you like to buy your books using the iBooks Store, I have some good news for you: you can buy the complete range of Hacking with Swift books through your Apple account and start reading immediately.
When you buy through Apple's iBooks store your purchase is instantly available on your other Apple devices with no DRM.
Pro Swift and Beyond Code are packed with videos, placed directly inside the text so you can read, watch, or do both.
Your purchases are automatically stored on iCloud, so you can delete them and redownload as often as you need.
Any free updates I release are automatically pushed to iBooks, so you can keep your library updated.
Here are direct links to each of my books on the iBooks Store, along with links to more information about each book:
Please note: If you buy Hacking with Swift through iBooks you don't get the bonus content, because it's not compatible with the iBooks Store. If you want the bonus content please click here to buy through Gumroad.