
James A. Mackay is a powerhouse in philatelic knowledge.
I have his "Stamp facts and feats" on my desk all the time.
His work is dated now at 1980, and I know of no one else
carrying on his very fine tradition.
I'll have to keep an eye open for that book of yours, never heard of it prior to now.
Bill Hornadge from Aust has a work out of similar theme, but have not read it.