This book was written to provide the reader with a firm understanding of the realities of the current Department of Defense space deterrence concept, its shortcomings, and the threat that these shortcomings pose to the United States. To highlight these shortcomings, a review of deterrence theory from classical to 21st Century writers were explored to compare and contrast with the Department of Defense's present concept to highlight its lack of deterrence theory. In addition, it was highlighted through an analysis of the Chinese view of deterrence in space, space weapons and the United States, just how in effective DoD space deterrence theory is and how the current National Security Space Strategy, the location of the space deterrence concept, is more likely to give rise to a "space Pearl Harbor" than to prevent one. The United States must re-think its current posture in space and develop a tiered, tailor, triad of capabilities and concepts that credibly deter, or if necessary defeat an enemy attack on our nation's critical space infrastructure. Disclaimer: This book reflects the analysis and positions of the author and not of the United States Department of Defense.