In short - it is the eight chapter of whole 18 parva (Chapter) of Mahabharata epic. It elaborates the appointment of Karna as third Chief commander of Kaurava army and describes Karna's battle with Pandava, till his death.
The original name of the Mahabharata is Mahabharata.
There are number of heroic things that Arjuna do in Mahabharata. The list is long and beyond the scope. Better you read the Mahabharata. Rather study the Mahabharata.
Yes, Mahabharata is a true story.
One highly recommended Mahabharata translation is "The Mahabharata: A Modern Rendering" by Ramesh Menon.
Ajaamila is personality who comes in Srimadbhagavata, not in Mahabharata
It was Bhimsen who killed Jarasandha in Mahabharata.
The gambling game is what Mahabharata is famous about.
The Mahabharata was narrated by Veda Vyasa, and Lord Ganesha (an elephant-headed deity) wrote it.
Because mahabharata includes in religios discussions
Lord Ganesha wrote Mahabharata and Ved Vyas dictated it.
The ISBN of Mahabharata - C. Rajagopalachari - is 9788172763688.