The search volume for the PDF version eclipses the hardcopy for several reasons:
This is where the book receives mixed reviews. R K Jain Mechanical Engineering Pdf
Mechanical Engineering by R.K. Jain
Since you are looking for a PDF review:
For many candidates, R.K. Jain’s book serves as a "review tool" rather than a primary textbook for learning concepts from scratch. Mechanical Engineering for Competitions by R.K. Jain The search volume for the PDF version eclipses
The books span fundamental and advanced subjects, including thermodynamics, fluid mechanics, machine design, production technology, and industrial engineering. and industrial engineering.