Evolving Software: SOLID principles as a continuum
Understand how SOLID principles work all at once to support each other, and their role as evolutionary guardrails for software systems.
evolution
The pentagon of entity models
Understanding a common pattern of entity models evolve, and why the process works that way.
The Mechanics of Software Evolution
How to adopt an evolutionary mindset and use feature requests as a breeding ground for the next generation of the system's architecture