Thinking Strategically

Game theory has traditionally been a tool of economists, but its use in management situations has been growing rapidly in recent years. This trend is sure to continue. Managerial decisions are not static and cannot be made in isolation. Instead, a manager must account for the reactions of both rival firms, subordinates, and superiors to his directives and proposals. Game theory is a tool to use to examine these interactions.

A good introduction is :
Thinking Strategically The Competitive Edge in Business, Politics and Everyday Life