In Japanese folklore, a ghost that arise from the burial of a pregnant woman is an Ubume .

The Summer of Ubume is the first of Japan's hugely popular Kyogokudo series, which has 9 titles and 4 spinoffs thus far.

Akihiko "Kyogokudo" Chuzenji, the title's hero, is an exorcist with a twist: he doesn't blieve in ghosts. To circumnavigate his clients' inability to come to grips with a problem being their own, he creates fake supernatural explanations--ghosts--that he the "exorcises" by way of staged rituals. His patients' belief that he has vanquished the ghost creating their problems cures them.

In this first adventure, Kyogokudo, must unravel the mystery of a woman who has been pregnant for 20 months and find her husband, who disappeared two months into the pregnancy. And unravel he does, in the book's final disturbing scene.

京极夏彦，1963年3月26日出生于北海道小樽。日本最可能得到诺贝尔文学奖的推理小说家。在成为作家之前，原本是平面设计，业务内容包括书籍的装帧等。他在工作之余，写下了处女作《姑获鸟之夏》，而于1994年出版的此作如今已成为推理史上的不朽名着。1995年出版的《魍魉之匣》只是他的第二部小说，就拿下第四十九届日本推理作家协会奖。

京极堂系列小说人物设定鲜明、布局精彩、架构繁复，举重若轻的书写极具压倒性魅力，书籍甫出版便风靡大众，读者群遍及各年龄层与行业。京极夏彦目前正以让人瞠目结舌的奇快速度创作，被誉为“神”一样的创作者。