This isn't a Smalltalk translation of "Design Patterns." Instead, it's a companion to that book. You'll need to read the first one to get the most out of this one. If you have read the first one, you'll find this one is better written and really casts essential light on some of the GOF material. The Smalltalk aspects of this book are really a non-issue (except perhaps showing static-typers how many hoops you don't have to use in Smalltalk). This is required patterns reading.