Which is the best Book for Mechanical Engineer of Thermodynamics?
Here are some of the books you can prefer for the same.
Thermodynamics: An Engineering Approach” by Cengel
Fundamentals of Statistical and Thermal Physics” by F.Reif.
Engineering Thermodynamics
Basic thermodynamics by P.K.NAG. It is is a very good book to understand the concepts. All the concepts are given in a simple language which is easy to understand.
Good Luck!