Hi Tashi,

Some of the best books that you can refer are-

For Undergraduates

1. Dutta for both Obstetrics and Gynecology.

    2. Shaw’s textbook for gynecology.

For Post Graduates

1. Williams textbook for Obstetrics.

    2. James for high risk pregnancies.

    3. J B Sharma text book for Obstetrics

    4. Clinical gynecologic endocrinology and infertility-Speroff.

    5. Operative gynecology -Te linde.

    6. Gynecology malignancy -Novak.

    7. Dutta for Gynecology.

Good Luck!