If you are looking for a physical book, try Problem Solving Strategies (http://www.amazon.com/Problem-Solving-Strategies-Problem-Books-Mathematics/dp/0387982191

If you are looking for a physical book, try Problem Solving Strategies (http://www.amazon.com/Problem-Solving-Strategies-Problem-Books-Mathematics/dp/0387982191/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1212016882&sr=8-1 http://www.amazon.com/Problem-Solving-Strategies-Problem-Boo...) or Problem Solving Through Problems (http://www.amazon.com/Problem-Solving-Through-Problems-Larson/dp/0387961712/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1212016929&sr=8-1 http://www.amazon.com/Problem-Solving-Through-Problems-Larso...).