It is one of the best books on chemical engineering.
I know this book very well, it was my favorte book in BSc, MSc and Phd. dgree. I can strongly say that every chemical engineer or chemical engineering student should have this book. Keep it as the best reference in unit operations. Author Giancoples added a clear explanation of the means of transport: heat transfer and mass transfer. In addition, in his book he talked about fluid mechanics in detail.
I can say that this is a very valuable book that you should never miss.