The Mahabharat is one of the major Indian hero-epics, narrative of the Kurukshetra War and the fates of the Kauravas and the Pandava princes, the Mahabharata contains much philosophical and devotional material, such as a discussion of the four “goals of life”. It is usually attributed to the poet Vyasa. Mahabharata is nearly 3.000 years old and in size it is more than ten times larger than the Iliad and the Odyssey combined. Bhagavad Gita, which is a part of the Mahabharata.
Mahabharat in bangla by Rajshekhor Basu in pdf format you can download from here.