When the classic book Design Patterns was first published in 1994, the landscape of object-oriented software engineering was forever changed. The 23 patterns contained in the seminal work vastly improved the discipline of object-oriented software design. That book, and the concepts it presented, allowed software professionals to solve specific design problems by reusing successful designs. Design Patterns was a gift to the world of software development, yet Smalltalk programmers could not take full advantage of the book's popular ideas because most of the original patterns were presented from a C++ perspective. In The Design Patterns Smalltalk Companion, the classic work has been tailored and enhanced to address the specific needs of the Smalltalk programmer. The catalog of simple and succinct solutions has been written in Smalltalk code, and the material is discussed from the perspective of the Smalltalk programmer. The full source code that supports the 23 patterns is also available via the Addison-Wesley Web site. Assembled and written in close conjunction with the authors of Design Patterns, this is the definitive patterns reference for those programming in Smalltalk. This book provides efficient solutions to your Smalltalk design problems, ultimately helping you become a better software designer.