Bleach 13: 05/29/08
Bleach 13: The Undead relies heavily on more bloated spirit energy battles. The biggest battle in this volume is between Ichigo and Kenpachi Zakari who is what Ichigo could have become if his friends hadn't intervened. Kenpachi relies on his brute strength both in his physique and in his spirit energy. Kenpachi is where Ichigo was back in Volume 8 except that he's never advanced beyond that critical point in his training.
In the process of learning about Kenpachi's underlying weakness Ichigo returns to the strange abandoned urban setting where he first learns to meld his strength with that of Zangetsu. His return to this metaworld gives hints as to its true power and to Ichigo's destiny.
I liked Bleach 13 more than the previous couple of volumes. It felt like the story was getting back on track even if the battle with Kenpachi Zakari took more of the pages than I would have liked. At least his battle was a means to further exposition.