As is mentioned on Reddit.com, Taylor Otwell (author of the Laravel framework) has released his latest book about the architecture of Laravel applications.

Written by the creator of Laravel, this is the definitive guide to advanced application development with Laravel 4. Learn about dependency injection, interfaces, service providers, SOLID design, and more while exploring practical, real-world code examples. Whether you're building a robust, large application with the Laravel framework, or just want to sharpen your software design chops, this book will be of great value to you and your team.

The book covers a lot of common architecture concepts too, not just things specific to Laravel like:

• Interfaces as contracts
• Working with service providers
• the Single Responsibility Principle
• the Interface Segregation Principle
• the Dependency Inversion Principle

You might notice that those last few chapters are actually covering the SOLID design principles. You can pick up the book over on Leanpub.