I was unaware that a 2nd edition of Mexico's Revenue Stamps had been published. Originally published in 2011, it was a long awaited update of "The Revenue Stamps of Mexico" by Richard Stevens, published in the 1970s.
Apparently this 2018 2nd edition was only published digitally, not in print. Eric Jackson carries it for an incredibly reasonable $13 + S&H:
https://www.ericjackson.com/rSearch...Group=&cond=I received my copy yesterday. It's nearly twice the length of the 2011 edition. While the preface makes reference to expanded listings, it appears that most of the increase is due to inclusion of images of all stamps from each set/series rather than just selected examples.
The 557-page PDF is approximately 750MB in size and comes on a DVD.
Well worth picking up if you have any interest in Mexican revenue stamps...
Additionally, another useful reference that Eric doesn't appear to carry is The Revenue Stamped Paper of Mexico 1821-1876, revised edition, published in 2016.
It's 442 pages 8.5x11 softbound and you can purchase it from the author on
ebay for $39 shipped in the U.S. Also eminently reasonable.
https://www.ebay.com/itm/Revenue-St...201692076984