I find it a little funny that you're looking for computer science subjects, but find wikipedia too academic :D
Anyway, here goes, in no particular order:
- The relational model: Introduction to Database systems
- Object orientation : Object Thinking
- Complexity and computation theory (think Turing machines and automata): Introduction to theory of computation
- A little compiler design: The Dragon Book, although this might be a little over too in-depth for your needs.
- Operating system concepts: Modern operating systems
- People skills: How to win friends and influence people
- Teamwork: Peopleware
- User interface design: The inmates are running the asylum
