I must say, I am somewhat disappointed in the local library. The other day I went to the Chinatown branch to find some books for school, and I came across no fewer than THREE copies of that 1421 book. Then, in the Chinese section, I found The Egyptian: The source of The Taiwanese 古埃及文（台灣話的淵源）by 林明華. It makes no sense, but here's a little excerpt that I could make out from the preface:

This book was five years in the making. But, it is a little mysterious, in the first four years I was constantly encountering obstacles, until ten months ago I found the "Way"... practically overnight, using Taiwanese to read each Egyptian pictograph, no matter how long or short, it went just as smoothly as reading a newspaper....