iBooks is a great way to download not only PDF files for safe keeping, but an even better way to download books. After all, that's what it was made for. The iBookstore has a vast collection of every kind of book you could possibly think of. Whether you're new to iOS in general or have never used iBooks until now, here's how to get started with download books on your iPhone or iPad.
First you'll need to download iBooks if you don't already have it installed on your iPhone or iPad. It's a free download from the App Store.
That's all there is to it. Your chosen book will begin downloading to iBooks where you can enjoy it.