Dear Kenneth, At first sight it seems that the last one (smalltalkbyexmissingchapter27) is more complete (table of contents included). I did buy the paperback version on AbeBooks.com Regards, Pierre Bulens De : Esug-list [mailto:esug-list-bounces@lists.esug.org] De la part de Richard Kenneth Eng Envoyé : November 23, 2018 5:29 PM À : esug-list@lists.esug.org Objet : [Esug-list] Smalltalk by Example, by Alec Sharp At http://sdmeta.gforge.inria.fr/FreeBooks/ByExample/, there are 3 PDFs containing the complete text of the book: * <http://sdmeta.gforge.inria.fr/FreeBooks/ByExample/SmalltalkByExampleNewRelea...> SmalltalkByExampleNewRelease.pdf * <http://sdmeta.gforge.inria.fr/FreeBooks/ByExample/SmalltalkByExampleON2.pdf> SmalltalkByExampleON2.pdf * <http://sdmeta.gforge.inria.fr/FreeBooks/ByExample/SmalltalkbyExMissingChapte...> SmalltalkbyExMissingChapter27.pdf I am very confused. Which one is the canonical version? There is no explanation anywhere about these PDFs.