The aim of this e-book is to propose a collective reflection about the notion of knowledge strategy, seen under any possible perpective. We are eager to understand, from the voice of the community of KM researchers, the feelings and viewpoints about the state and prospect of this notion, and its possible future in the theory and in the business practice. How can the notion of knowledge strategy be expressed more clearly? What studies and investigations have inspired? Is the concept of knowledge strategy still fruitful, or have we reached a point where nothing really new can be said?Indeed, the small sample of papers show that the topic of knowledge strategy is not yet "the past" but is well "the future". The ideas themselves of knowledge strategy and KM strategy still stimulate varied and differentiated reflections, research efforts, theoretical interpretations, and formulations of practical guidelines.