So, just like the Fallout NV hardcover guide, the Fable III Hardcover LE guide from Bradygames is now $20.99 as well. It changed yesterday as per camelcamelcamel.com, but mine hasn't changed yet from my preorder, so I sent an email to Amazon.
The Fable II guide was the softcover guide packaged with a separate art book, but this one is a 448 page HC guide with an art section. The regular guide seems to be 16 pages less.
Fable III LE Guide
The Fable II guide was the softcover guide packaged with a separate art book, but this one is a 448 page HC guide with an art section. The regular guide seems to be 16 pages less.
Fable III LE Guide