Hmmm. I got the same white page when trying to access Hotmail while trying to help out another user. There doesn't seem to be a reliable fix (although for Hotmail I did find that the Opera browser app doesn't seem to have the problem while the Dolphin browser had the same problem as the native browser.)

Given that christianbooks.com provides books in Adobe Digital Editions format, I would use a PC to purchase and download the ebook. You can then transfer the ebook to your eDGe using an SD card, or a USB memory stick. Alternatively, you can download and install the Opera browser app for Android and use it instead.