Found 2 books

Design Patterns · Elements of Reusable Object-Oriented Software (Joanne Romanovich's Library)

[en] Design Patterns · Elements of Reusable Object-Oriented Software (Joanne Romanovich's Library) Addison-Wesley Professional

Gamma, Erich & Helm, Richard & Johnson, Ralph & Vlissides, John

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Design Patterns · Elements of Reusable Object-Oriented Software

[en] Design Patterns · Elements of Reusable Object-Oriented Software Addison-Wesley Professional

Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides

download read it!