Stereochemistry has always occupied a central position and is pivotal to the practice of organic chemistry. A solid understanding of this subject is indeed critical to subsequent success in a science career. The new eleventh edition provides new material and problems to help the students. The key features of this new edition are: The new added material further impresses the role of stereochemistry in understanding mechanism of organic reactions and synthesis and prepares the students for NET examination. The existing material in the first chapter has been extensively rewritten and rearranged. The fundamental principles have been explained by taking the same compound bromochlorofluoromethane. New material and problems have been added in all the chapters. The updated concepts of stereochemistry and dynamic aspect of stereochemistry have been incorporated. Material on topicity has been further modified. This book will prove to be a boon to the students preparing for the NET(CSIR), GATE and other competitive examinations.