Our first book summarize 50 years' experience in phosphorus chemistry. Organophosphorus chemistry is one of the most categories in pharmaceutics, pesticides, and industry. We put our efforts to present the information in concise, easy, and fruitful way. The two parts of our book covered most accessible synthetic approaches to precursors of pharmaceutical drugs and their applications. We also take this opportunity to thank the team at Reach Publishers that have made this such an incredibly fascinating experience manner