In my Economics Graduate Program we are fond of referring to big whig economists whom we also respect as "Rock Stars". Oz Shy is a wonderful example of someone I consider a Rock Star even though he is less recognizable than Tirole and others. The reason for this comes from his ability to write clearly for both undergraduates and graduates and distill the key features of seminal models into accessible chunks of intuition, with no more math than necessary. I also recommend his book on Network Economics for all undergraduate and graduate students in Industrial Economics. If you get bogged down in Tirole, you'll feel like Oz Shy is breath of fresh air - these book can be read cover to cover or as a tool box of models. Highly recommended.