I am providing you the complete list of books for GATE.
1. Thermodynamics(P.K. Nag)
2. Machine Elemnts (V.B. Bhandari)
3. Fluid Mechanics
4.Material Science(O.P. Khanna)
5. Automobile (Kripal Singh)
6. Strength of Material (R.K. Rajput)
7. Dynamics of Machine
8.IC Engine (V. Ganeshan)
9. Engineering Mathematics\
10. Quatitative Apptitude(R.S. Aggrawal)

You can also take study material from Institute like; Madeeasy, gateforum, ace etc.

Good Luck