I'm reading The Unfinished Clue by Georgette Heyer. The edition I have has the ISBN of 0-586-02693-2, and it's a paperback of 288 pages first published by Grafton Books in 1964. If I search on that ISBN, I get a link to a 208-page 'mass market paperback' with a different cover which is listed as being published by Panther in 1969 (what is the difference between a paperback and a mass market paperback?)
The only 288 page editions are recent reprints under a quite different ISBN, e.g. https://www.goodreads.com/book/show/1... I can't add this as a new edition because the site complains that the ISBN is already in use.
The edition I have has the ISBN of 0-586-02693-2, and it's a paperback of 288 pages first published by Grafton Books in 1964.
If I search on that ISBN, I get a link to a 208-page 'mass market paperback' with a different cover which is listed as being published by Panther in 1969 (what is the difference between a paperback and a mass market paperback?)
The only 288 page editions are recent reprints under a quite different ISBN, e.g. https://www.goodreads.com/book/show/1...
I can't add this as a new edition because the site complains that the ISBN is already in use.