‘An Architecture for Secure Mobile Payment System Using PKI’ puts forth a standard book for Secure Mobile Payments which would be of immense value for researchers in Computer Science. With a vision of securing mobile payment transactions, the book has accomplished the task of elaborating the standard secure mobile payment protocols and essential design techniques in a friendly manner. To sum it up the book is a boon to budding researchers of Computer Science. Part 1 deals with fundamental concepts of Software Architecture, Mobile Commerce and Mobile Payments. Part 2 describes the existing architectures, models and security protocols for mobile payment system. Part 3 proposes an architecture and security framework, and discusses them in the same part. Part 4 provides standard security algorithm for proposed mobile payment system. Part 5 presents the performance of the proposed system for response time and throughput. Finally, future research directions are presented in the Part 6.