The Progress Bar in Downloading is Stuck.

Hi Guys.

I have downloaded ibooks on my Ipad 2 (IOS 7) and have had trouble downloading it. The progress bar is stuck and won't move. I've tried rebooting, retyping my Apple ID and shutting it down but it still is just slides back to the same progress.

It's a fifth of the way down as well, and I've made sure I'm connected to Wi-Fi!

Help would be greatlt appreciated!

Thanks, Zephyr. 🙂