The book "One Dimensional Optical Orthogonal Coding" by Ratnesh Kumar offers a comprehensive analysis and discussion of various optical orthogonal codes. It introduces a newly developed one-dimensional optical code system that is considered optimal in terms of auto-correlation and cross-correlation. The author presents innovative methods for calculating these correlations, which are significant for improving bit error performance and multiple access interference in optical systems. This specialized book is aimed at professionals and students in the field of optical communication and provides valuable insights into the development and application of orthogonal codes.