This book is the result of sustained hard work by authors to striking results. Readers will definitely get benefit from this book and they can even reproduce the work if they wish to. This book shows association of two carcinogen detoxifying genes (GSTM1 and GSTT1) with prostate cancer risk in Pakistani men. Multiplex PCR was used and striking results have been obtained by revealing the gel on UV light in gel documentation system. It is worth reading this book.