NCERT books of each subject like Hindi, English, Mathematics, Physics, Chemistry, Geography, Accountancy, etc. for class 12 are available here in English medium as well as in Hindi medium. You can use it for better conceptual knowledge so that this knowledge will help you in future studies. These books are very conceptual therefore so many competitive examination boards follow NCERT syllabus and almost all state boards and central boards follow NCERT syllabus. NCERT books are the storage of core and fundamental knowledge.
In this website, we are providing third party link of all NCERT book for class 12. All books are available in PDF format, you can download it for free.