You can get the book for much less on amazon[1] though for a reasonable price (including a look inside). There is even a direct link to Amazon on his website.
How to Sharpen Pencils: A Practical & Theoretical Treatise on the Artisanal Craft of Pencil Sharpening for Writers, Artists, Contractors, Flange Turners, Anglesmiths, & Civil Servants
[1]: https://www.amazon.com/How-Sharpen-Pencils-Theoretical-Contr...