Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

It is very interesting that the May 1977 ad in Popular Science magazine references a 128 page book by Dr. Theodore Finkelstein, rather than the ubiquitous Andy Ross book of 122 pages that was first published in 1977. I have a few copies of the Ross book, but have never seen a copy of the Finkelstein book.

I would love to get my hands on a copy of the earlier offering!

My guess would be that Ed ran into some issue, either with obtaining an adequate supply, or getting authorized use of the Finkelstein book, thus shifted gears to the Ross book when it became available. Perhaps the Ross book was specifically written to supplant the earlier offering, to get around whatever the difficulty may have been?!?!