Linn's Focus on Forgeries: A Guide to Forgeries of Common Stamps was published in 1993 by Linn's Stamp News.
This useful book by Varro E. Tyler lists 150 stamp forgeries from A to W, side by side with the genuine ones, and compares both.
The introduction states in part that "This compilation of 150 Focus on Forgeries features that originally appeared on a fortnightly basis in Linn's Stamp News is published at the request of many stamp collectors."
Illustrations are in black and white.
This revised edition of the Philatelic Forgers: Their Lives and Works was published by Linn's Stamp News in 1991.
I counted 150 forgers listed in this entertaining book by Varro E. Tyler.
The book is illustrated with black and white pictures of some of the forgers and some stamp and other philatelic forgeries.
