hi, being a student of WBCHSE board is very well, there are many books from your boards which are as good as ncert. For maths, there are a lotof students who prefer "S N DEY" over NCERT for JEE level exams like WBJEE. Its not the case that only ncert is good for studying. All you need to know is the best books in your board and definitely, those will be much more to understand.