ppint. 14th May 2017
| | @oldmod67 that is the sbn - the 9-digit standard book number° - plus the cover price of the mmpb°° (merkin: "mass-market paperback"°°°) in us¢ - so here, the cover price was $1.50, the sbn was 53215179, with 532- being the publisher's unique identifier. there was not necessarily any relationship between a publisher's cat# and the individual book-identifier after the publisher's prefix, especially if the cat# antedated the adoption of the sbn (and even the abn°) system by the publisher.
° - antecedes the isbn - the international standard book number, which would later be obtained by prefixing the sbn with a "0" if still in print/reprinted with what would elsewise have been the same sbn. preceded in merkia by the abn - the american book number, which was a scheme incompatible with the international standard book numbering system originated in london for the yuk-of-gb-and-norn-iron-and-commonwealth, with the first digit 0- (later also 1-) indicating book publication is english language.
°° - appending the cover price (recommended retail price, list price) of mmpbs to the publishers' cat#s (catalog numbers) started when the standard price of mmpbs ceased to be 25¢, (later 25¢ or 35¢), but might be 35¢, 40¢, 45¢, 50¢ or even 60¢! it was carried over into the abn system, and thence into the merkin usage of the sbn, to which it shouldn't really have been applied, as it wasn't defined in the system and different publishers formatted it in different ways - but it was useful
°°° - as opposed to "trade paperback", mmpbs were originally distributed primarily by news wholesalers and treated as monthly magazines, with covers rippable-off and returning by the wholesalers to the publishers for credit.°°°°. the " publication date" of mmpbs was in fact the (earliest) date they could be "stripped" and the stripped covers returned for credit, hence a clear month after the date they were actually published - the same system as that for the cover dates of merkin magazines
they were also distributed direct to retail bookshops and to department stores (and their warehouse centres): i presume these latter also had the privilege of returning covers for credit; small and medium-sized independent bookshops effectively did not
°°°° - trade paperbacks were distributed through a publisher's distribution system for their hardcovers, and in general not returnable for credit - leastways, not above a certain small percentage of their account turnover, and as whole copies in as-new condition only, and as authorised by the publisher's sales rep(resentative) or by their accounts department |