One of the most frustrating things about any sharpened implement is getting it back to a razor edge. From a pocketknife to a straight razor to an ax, a fine edge is the key to a close shave.
The best book I've found by far is the Razor Edge Book of Sharpening. This book features practical information in a straight forward way, and will have you sharpening every blade in your house like a pro.
"Universally recognized as "The Bible of The Cutting Edge", this book belongs in the library of anyone who is serious about sharpening. Written by Guinness world record holder John Juranitch, it contains all the knowledge and insights gained during his more than 40 years in the sharpening industry.
The 145 page book is crammed with photos, illustrations and cutting edge secrets you won't find anywhere else. Its 14 chapters cover topics like how to choose a knife, sharpening theories and applications, steeling, using a hone and much, much more. You'll get answers to the most asked questions. You'll learn the truth about common myths like why you should never use oil on a hone. And you'll get the insights necessary to put a great edge on knives, axes, fish hooks, arrowheads, chain saws and other tools.
It's a history, a handbook, a reference manual that is the simplest, most complete way to give yourself a razor edge on sharpening."
Here's a video clip of the author shaving with an ax. Yes, an ax.