Smalltalk-80: The Language and Its Implementation (with David Robson[?]), Addison-Wesley, 1983, ISBN 0-201-11371-6 (out of print; known as the "blue book" to Smalltalk people)
Smalltalk-80: the Interactive Programming Environment, Addison-Wesley, 1984, ISBN 0-201-11372-4 (the "orange book")
Smalltalk-80: The Language (with David Robson), Addison-Wesley, 1989, ISBN 0-201-13688-0 (the "purple book" - a revision of the "blue book")