Elements of mechanical engineering

A wide ranging introduction that connects mechanics, materials, fluids, and thermodynamics through worked examples and engineering judgment. One of the most complete free texts on the subject.

Paul D. Ronney

Covers thermodynamics, fluid mechanics, and the core machines and processes of mechanical engineering. Structured as clear unit based notes.

MRCET

Introduces steam boilers and turbines, internal combustion engines, and the foundations of mechanical power. A practical overview of how energy systems work.

Shanmugam G. and Ravindran S.