In response to an other (locked) topic:

New Grappler Baki is a direct continuation of the first series (Grappler Baki)
Baki : Son of Ogre is the third series. (also a direct continuation)

The first series of Grappler Baki is covered by the anime. (2 x 24 episodes plus 1 OVA episode.)

So if you've seen all of the anime, you can just continue the story by reading the New Grappler Baki series.

Ah thanks alot. I only watched the first half of the anime. Guess I'll watch the second series.