Peter Aschwanden (October 4, 1942 – December 3, 2005) was a New Mexican artist and illustrator whose work was emblematic of the 1960s generation's freewheeling spirit.
Following Muir's death, additional new material and revisions for subsequent editions have been provided by Tosh Gregg.
[2] A photo of Aschwanden appeared in the book, with the caption reading his pseudonym, "Amanda B.
[3] Aschwanden would also contribute illustrations to Muir's publication, The Velvet Monkeywrench.
[4] He illustrated The Septic System Owner's Manual: Subterranean Mysteries Revealed in the same trademark style he used in the Volkswagen repair books.