A pseudonymous Baron Otto von Tu (in real life, humorist Doug Skinner) is the author of the Club Recluse handbook, the “club” being fellow-hermits. The little 1997 pamphlet published by Vaudevisual Press of New York City is described thusly on the Printed Matter website:
“The Club Recluse Handbook is a guide manual for living alone and enjoying it. Created by Baron Otto von Tu for himself in 1997 who finally gave in to sharing it with the public, stating “I ask only that you make no attempt to contact me; that you do not send me a copy; and that I receive 70% of all profits.
“The book is dedicated to those thousands of staunch hermits who have embellished human history – particularly those who were so reclusive that their names have not come down to us.
“Sections include how to make a living through antisocial employments, solo entertainment, and a New Year’s Eve kit for celebrating alone. Members are not solicited, and, once enrolled, never hear from the club again or meet fellow members.”
URLs: https://www.printedmatter.org/catalog/56786/ and http://www.dougskinner.net/?s=club+recluse