This 554 page monster combines the first three volumes of the seinen (young men's) manga "xxxHolic" by the all-female artist collective known as Clamp, who apparently created this series to tie in with their other works, such as "Tsubasa" and "Cardcaptor Sakura" — both of which have characters and plot lines that cross over here.

xxxHolic Omnibus 1, by Clamp.
Kodansha Comics, Manga.

Kimihiro Watanuki is a high school student troubled by visions of spirits. When he stumbles into a mysterious shop he meets Yuko Ichihara, a witch who promises to remove his ability to see spirits on the condition that he becomes her housekeeper, a position which ultimately sends him on all kinds of esoteric adventures.

The manga's translation notes will be of particular interest to anyone studying Japanese.