The book "Intrusion Detection System Architecture in Wireless Sensor Network" provides a comprehensive analysis of the security challenges associated with wireless sensor networks. These networks are used in both civilian and military applications and are often deployed in open, unprotected environments. Given the shortcomings of traditional cryptographic mechanisms, the need for an Intrusion Detection System (IDS) becomes evident. The author, Mohammad S. I. Mamun, proposes a policy-based IDS specifically tailored to the current requirements and limitations of wireless ad-hoc sensor networks. This specialized book is aimed at professionals and students who are engaged in wireless network security and are seeking innovative solutions to enhance network security.