I found these books on Ebay, they look real nice but are kinda pricey. The seller has 3 different ones for sale... http://cgi.ebay.com/HEATHS-INFALLIB...emQQptZLH_DefaultDomain_0?hash=item439e4c0ecf
LATHER posted a thread with an auction link for a Heath's book selling on eBay back in January. That auction realized $745.
Ooooh no, this will bring MUCH more than $200. There was a US bond detector from 1869 (for checking Treasury bonds) that went for over $800 last week. Fantastic intaglio plates. I predict this one will top $400, maybe $500.
