apart from matrix u can study the subjects from the following books maths---- das pal physics ---- amal chakraborty electronics---- tirthankar datta/rakshit chattopadhyay electrical ----- abhijit chakraborty/mittal/thereja/ashfaq hussain mechanics---- bera das bhattacharya/ghosh chakrabarti ghosh/suman chakraborty evs---- gourkrishna dasmohapatra hope this will help u