Books

Canol Gokel's book "Computer Programming using GNU Smalltalk" is available as a free e-book, or you can buy a printed version. The book is under a dual CC-BY-SA and GFDL license.

The GNU Smalltalk manual includes a tutorial. An online version is available.

Other free books

There are many other free books about Smalltalk (unfortunately most of them are only gratis, but some of them are under a free license). While not specifically targeted towards GNU Smalltalk, they can be an extremely rich resource for anyone wishing to learn Smalltalk or even other dynamically typed, object-oriented programming languages.

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