"Not One Step Further East" by Mary Elise Sarotte provides an in-depth analysis of NATO's eastward expansion and its impact on the geopolitical relations between America and Russia. The book highlights the complex historical and political contexts that led to the decisions made by NATO in recent decades. Sarotte utilizes a variety of sources to present the perspectives of the involved actors and to illuminate the often controversial debates surrounding NATO policy. The author not only offers a critical examination of the events but also provides insights into the future challenges arising from these developments. This non-fiction book is suitable for both professionals and interested readers who wish to gain a better understanding of the dynamics of international politics and the role of NATO.