"The Sins of Genes" is a specialized book that addresses the genetic basis of breast cancer, one of the most common cancers among women. It highlights the role of telomerase and the hTERT protein, which are crucial for the activation of telomerase in cancer cells. The book also examines the function of miRNAs as regulators of gene expression and their influence on the development of breast cancer. Additionally, it discusses the genetic susceptibility to breast cancer, focusing on familial risk factors. The authors, Manoush Tohidi Rad and Shahin Asadi, provide a comprehensive analysis of the genetic factors that may contribute to the development of breast cancer and discuss the statistical risks associated with family histories. This book is aimed at professionals and students seeking a deeper understanding of the genetic aspects of breast cancer.