The Prince of Abissinia (Rasselas)

No book-club editions for a 1759 title; the traps are the 1759 second edition (title-page states 'The Second Edition'), the many later London and Dublin reprints, and post-lifetime editions that place 'The History of Rasselas' on the title-page — the form under which virtually every modern reprint appears. Miniature and gift-book Rasselases are 'first thus' at most. Practical rule: if the title-page says Rasselas, it is not the 1759 first.