NCERT texts being textbooks for school children are written in a very simple and lucid manner. They are not only easy to study, but also can help to save a lot of time. You can quickly grasp difficult topics and concepts. If aspirants have enough time, it is always advised to start from standard 6 NCERT texts and read till standard 12 texts for all relevant subjects. Combining all the subjects from all the classes you need to read about 40-44 books in total. Here you can download all the NCERTs required for your preparation.