Originally Posted by sroys
I think the problem is that they're .bmp images, which the DX won't handle
Google books include a mixture of JBIG2 and JPEG2000 images, see Google Books: making the public domain universally accessible
. These are often problematic on sub-par PDF viewers. Under Windows PDF95 can produce readable versions (at least for the iLiad), see problem opening pdf files from books.google.com
(look at post #10).
Another possibility is to get the ePub versions from the Sony ebook store and convert them to MOBI using Calibre. I have not tried this, and I would be interested in hearing how well this works on the KDX.