There are readers, and then there are fans. Readers offer condolences when a favorite author falls ill. Fans offer bone marrow. Robert Jordan, author of the best-selling Wheel of Time series, has fans. And if you want to understand them, take a look at his blog. Since last spring, when he announced he had a rare blood disease called amyloidosis, Jordan, 58, has been chronicling his life-and-death struggle online. Whenever he's well enough to write, he thanks the fans who sent care packages, and those who donated to the Mayo Clinic, in Rochester, Minn., where he is being treated. Then...
