xxxHolic Volume 09: 05/10/12
xxxHolic Volume 09 by the mangaka group CLAMP has three stories all which reveal something about Watanuki's situation. By now Watanuki has come to realize he's probably not a normal teenage boy. It's not his missing parents per se that make him usual but they are part of the equation.
The first story introduces the power of dreams. Watanuki accidentally buys a dream and in return he has to sell a dream. The power and currency of dreams comes late in the series but resonates all the way through from the very beginning. Readers also following Tsubasa Reservoir Chronicle will recognize similar themes and circumstances between Syaoran and Watanuki.
If Syaoran and Watanuki are spiritual twins, one might wonder who Sakura's twin is. The introduction of a young and emotionally abused medium might the a clue. Wantauki first befriends her over the state of a haunted cherry tree. Like the spider grudge arch, her story will take more than chapter in this and upcoming volumes.
Along with the medium, a new mentor for Watanuki is introduced, Dômeki's grandfather. He is rendered to look just like his grandson but he clicks with Yûko's protege in ways that the real one has yet to.
For me this is the point where I got serious about reading Tsubasa Reservoir Chronicles. Too many xxxHolic questions are now answered with clues from the other series to ignore it.