The book "Communications, Information and Network Security" offers a comprehensive and well-founded analysis of current developments in the field of communication, information, and network security. It is aimed at both professionals and academic researchers and covers key topics such as space-time coding, multi-user detection, and wireless networks. The contributions come from leading experts who present new and original findings that are significant for the advancement of communication and data security. This work is a tribute to the extensive and profound contributions of Ian Blake, whose influence on the field is undeniable. The individual contributions reflect the authors' commitment to sharing knowledge and innovation in this dynamic area.