From the back cover:
A fierce battle rages in the borderland lying between the world of the living and the afterlife. A mysterious force is attacking Inuyasha and preventing him from obtaining the last Shikon shard. This force claims to be acting on behalf of the will of the shard itself! Inuyasha also faces the dreaded Naraku, who will stop at nothing to obtain the shard. When all hope seems lost, Inuyasha receives help from a surprising force—his half-brother!
This volume is good, but the confrontation over the final shard is initially kind of dull. Then Sesshoumaru gets into the game and once everyone begins to contribute, it becomes more interesting.
The pattern of Sango and Miroku with their own mission to accomplish continues, to my enjoyment, and ends on a great cliffhanger with her encountering her brother, Kohaku, formerly under Naraku’s control but now in possession of his memories again and simply biding his time while maintaining the appearance of minionhood.
I also enjoy seeing the internal power plays within Naraku’s camp. His “team” is finally shaping up to have as much interpersonal dynamics as the good guys, and it’s very welcome. I’ve really enjoyed my InuThon; it’s going to be a long wait ’til July for the next volume.