Pragmatic Programmer http://www.amazon.co.uk/Pragmatic-Programmer-Journeyman-Master-ebook/dp/B000SEGEKI/
Clean Code [Robert Martin]
The Clean Coder
Code Complete
Refactoring: Improving the design for existing Code
Working effectivly with legacy code
Head First design patterns
The passionate programmer
Pragmatic thinking and learning
Zen and the Art of Motorcycle maintence
Software Craftsmanship: The New Imperative
Apprenticeship Patterns: Guidance for the Aspiring Software Craftsman
The Art of Learning: A Journey in the Pursuit of Excellence
The Craftsman
Domain-Driven Design: Tackling Complexity in the Heart of Software