I bought: 'Interior Design- Visual Presentation' By Maureen Mitton, and Its amazing!
It's full of amazing advice and information about 2D and 3D drawing and presentation, I can already tell that it's going to be a lifesaver...
I also bought the Architects Pocket Book by Charlotte Baden Powell, as It is part of our reading list this year, and few others just for fun!
Terence Conran: Essential Small Spaces
Smart Apartments: FKG
Living Modern: Weaving/Freedman
Young Spaces: Patricia Bueno
150 Best Eco House Ideas: Collins Design