Free tutorial - http://www.iam.unibe.ch/~ducasse/FreeBooks.html http://squeak.preeminent.org/tut2007/html/index.html History - http://users.ipa.net/~dwighth/smalltalk/byte_aug81/design_principles_behind_smalltalk.html Smalltalk Zoo - https://medium.com/chmcore/introducing-the-smalltalk-zoo-25b64ebeb642