Dobson, Wayne: Z6 Or How I Overcame My Fear of the Z-fold Wallet © Wayne Dobson Softcover, saddle-stitched, 5.5x8.5

Image courtesy eBay seller FlosHubby

Comments: Six routines for the "Z-Fold" Himber type wallet; can be used with other similar wallets

Contents (from web description, numbers are not page numbers):

1 Improved Simplex Card 2 Wallet
2 Autographs
3 Missing Think?
4 Z-sy Does it
5 Sting
6 Tax