Hello,

You college has given you the prescribed book list for different subjects. follow those as first priority, then look for other books. on the part of getting marks, it depends on you how much you have learned,understood and have the skill to solve a numerical given to. No matter how many book you read, if you don't understand and know what is happening , you won't be able to score well.

So learn,understand and solve numericals. refer books and have patience to everything. it is will hard at first as they will feel boring but do solve it at any cost.

Hope it helps!