Ethica (first printed in B.d.S. Opera Posthuma)

No book-club edition exists for a 1677 quarto. The reprint tells that matter: the work was banned in Holland in 1678 and placed on the Index in 1679, so later 17th- and 18th-century appearances are separate editions, not printings. Nineteenth- and twentieth-century scholarly editions (Paulus; Van Vloten & Land; Gebhardt) and modern anastatic/photographic facsimiles of the 1677 sheets circulate and are what donors realistically hold — a facsimile reproduces the imprint-less title page faithfully, so judge on paper, type impression and binding rather than on the title page alone.