I have the 2-volume 3rd edition of 1906, but find that since I completed my set of Bynof-Smith, I very rarely have need to refer to Earee.
For those who haven't seen it, this is a 5 volume set published over several years in the early '90s thus:
1990 ... Forged Postage Stamps of the British Empire (193pp)
1991 ... of the Americas (206pp)
1992 ... of Africa and Asia (excluding colonies of European countries) (145pp)
1993 ... of Europe and colonies Albania to Greece (230pp) &
1993 ... of Europe and colonies Hungary to Ukraine (213pp)
Essentially it is pages selected from his extensive collection, the left hand pages being descriptive, the right hand being the illustrations, as below:
This gives it two great advantages over Earee - both in illustrating the fakes, and also illustrating and describing the genuine.
I use it a lot to verify pre-1910 items (I'm working on filling a 1910 Ideal) being sold via TradeMe, especially those pesky German States and early Japan.
Where I tell the vendor they have a forgery, to date they have all been nice about it, and withdrawn the lot. Some put it back up almost immediately as a Forgery, and sometimes don't even change the start bid!
I picked up my volumes 2-5 as they were issued, but had to wait until earlier this year to finally win Volume 1 in an auction, having been outbid on several previous occasions.
I have not seen a full set offered as one lot, but would expect it to go for more than Earee.
Still, I think it's a great reference - does anyone know how many sets were issued??