The following four books (all in used but respectable condition) are listed as a lot on the Big Bay in the Sky:
Aspen Bar Magic (Magical Arts Journal Special) – Michael Ammar, 80 softbound pages (1990)
My Almost 50 Years in Magic – Tom Craven, 190 hardbound pages (2011)
Applications – Peter Duffie, 60 hardbound pages (1993)
Encyclopedia of Impromptu Card Forces – Lewis Jones, 176 hardbound pages (1994)
Starting bid is $19.99...
https://www.ebay.com/itm/4-Books-Aspen- ... SwBRVadjnj