Phil Japikse explains SOLID software principles - Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion- and how to apply them using design patterns.

Andras describes the SOLID design principles as a collection of guidelines for object oriented software design where each of them are meant to make a code base easier to understand and maintain.

For many software engineers, this book stands as the feature-complete reference for object-oriented design patterns, and it’s rock solid.