The Open Library project digitizes older and out-of-print textbooks. You can legally borrow digital copies of academic books for set periods.

Sometimes, the exact 5th edition of "Basic Mechanical Engineering by J Benjamin" is hard to find. If your search fails, do not panic. Here are that cover the exact same syllabus:

The book is designed specifically for first-year engineering students who are not majoring in Mechanical Engineering (e.g., Computer Science, Electrical, Civil). It covers the standard pillars of the curriculum efficiently: