You can read on the go without an Internet connection with TextbookHub. To do that, you must download your books onto your device.
Downloading Books with iOS Devices
1. In the TextBookHub app, navigate to “My Bookshelf” in the side menu and select the book you wish to delete by tapping on the book cover.
2.. Through the book details panel, locate and tap on the “Download” button:
3. Once the download is completed, your book will be available for offline use on your device.