Need advice

Hii. So I've just got over with my mba and I'm left with the totally unused totally new books I got during my mba from my college as their cost was included in the college fees. The fees for books was about 60k. And the books being totally unused breaks my heart. They're all mcgrawhill only. The subjects being marketing, finance , operations etc etc they are of no use to me . Do you have an idea where should i sell those.