Collaborative Advantage	Toyota became one of the world’s leading auto makers by applying the concept of the extended company to its supplier network. In the nineties, Chrysler used this model as the basis for a complete reorganization. Results were spectacular. Collaborative Advantage draws lessons from these two examples. The author shows that establishing a special relationship with a few suppliers can generate a decisive competitive advantage. He then describes the keys to implementing this type of partnership successfully.
Jeffrey H. Dyer, Oxford University Press, 2000.
Profitable Purchasing Strategies	This book presents the key principles to strategic purchasing management, which can be summarized as follows: implement different approaches based on purchasing portfolio segmentation; manage procurement risks; manage cartel or monopoly situations effectively; organize purchasing to take advantage of both centralization and decentralization.
Paul Steele and Brian Court, McGraw-Hill, 1996.