I think any other "suggestions" would not compare to Sherlock's here.Here's my list for you, and this is recommended from me and others I know.
Designing Miracles
Strong Magic
Card College
Split Spades
Approaching Magic
Inner Secrets to Magic
If you don't have any of those books then you need to rethink your stuff and get those instead. If you do magic just as a hobby then don't listen to me.