Operation Research by H.D.Sharma (Strongly Recommended)Industrial Engineering by O.P.KhannaEngineering Metrology by R.K.JainIndustrial Engineering by B.KumarInventory Management and Operation Research by Heera GutpaManufacturing ScienceManufacturing Technology by P.N.Rao (Strongly Recommended)Manufacturing Science by Ghosh and Mallick (Strongly Recommended)Production Technology by P.C.Sharma (Vol-1 and Vol-2) (Strongly Recommended)Manufacturing Science by Serope Kalpakjian and Steven R.Schmid (Strongly Recommended)Powder Metallurgy by G.E.DieterProduction Technolgy by G.R.NagpalManufacturing Science by De Garmo.Manufacturing Science by Pandey and singhWork Shop Technology by Hajra ChaudhariHeat TransferEngineering heat and mass transfer by R.C.Sachdeva (Strongly Recommended)Heat transfer by R yadav (Strongly Recommended)Heat and Mass transfer by Arora and DomkundwarHeat Transfer by Holman J.PThermal ScienceEngineering Thermodynamics by P.K.Nag (Strongly Recommended)Power Plan Engineering P K Nag (Strongly Recommended)I C engine by Ganeshan (Strongly Recommended)Thermodynamics by Mathur ,Mehta and TiwaryThermodynamics by R.K.RajputReferigeration and Air Conditioning by C.P.AroraPower Plan Engineering by R.YadavThermodynamics by Turner BolesGas turbine by YayaFluid MechanicsFluid Mechanics by K. L .kumar (Strongly Recommended)Fluid Mechanics by R.K.Bansal (Strongly Recommended)Fluid Mechanics by Modi and SethFluid Mechanics by A.K.JainTurboMachinary by R.YadavFluid Mechanics by D S KumarDesign of Machine ElementTheory of Machines by S.Ratan (Strongly Recommended)Theory of Machines by Jagdish Lal (Strongly Recommended)Theory of Machines by R.S.KhurmiTheory of Machines by AmbedkarDesign of Machines Element by V.B .BhandariDesign of Machines Element by R.S.KhurmiDesign of Machines Element by J.E.ShigleyDesign of Machines Element by Schaum SeriesDesign of Machines Element by P C sharama and AgrawalVibrations by M.P.GroverEngineering Mechanics and Strength of MatterMechanics for Engineers (Statics and Dynamics) by Beer and Johnston (Strongly Recommended.)Mechanics of Material by Beer and Johnston- (Strongly Recommended.)Strength of Material by Sadhu Singh (Strongly Recommended.)Strength of Material by Rammurtham (Strongly Recommended.)Strength of Material by R.S.KhurmiStrength of Material by K.L.KumarStrength of Material by Popov select the one you have studied and also go through these books very seriously they will be very helpful to you in gate and psu exams tooGATE 2010 by GK publishersIES made easy booksMechanical Engineering by RK jainQuantitative Objective in Mechanical Engineering by RS khurmi & JK gupta more or less stick to basics it will be good