Originally posted by: Eloquent
I read it more like each book focussed on the challenges faced by the Pandavas & overcoming them.
So name of each book/parva is regarding the biggest challenge in the parva e.g. Bhishma, Drona, Karna, Shalya.
Also true that while the Kaurava commanders changed frequently, Dhrishtyadyumna remained commander for all 18 days.
Fir to Shalya Parva Ka naam, in fact poore war narration Ka naam Duryodhan Parva Hona chahiye tha
Just kidding