Ghost Hunt by Shiho Inada

Rated T for Teen 13+ from Del Rey

The North Branch Library has books volumes 1-9.

Volume summaries:

Volume 1
Mai Taniyama and her friends are in the darkened AV room telling ghost stories. As each one finishes her story, she turns off her flashlight. One tells stories of the old abandoned building behind their school. It should have been demolished years ago, but each time workmen come to tear it down strange accidents happen leading to serious injuries and even deaths. As the story comes to an end and the last flashlight is turned off, the girls are startled by the appearance of a young man.

The next morning, Mai is walking to school early and as she passes the derelict building, she remembers the ghost stories from the previous days. She decides to take a look and notices a camera inside. Curious, she enters the building. Startled by the appearance of someone, she stumbles and falls, causing the camera to crash down and the man to be injured. The man turns out to be the assistant of Kazuya Shibuya, the young man she met the day before and the head of Shibuya Psychic Research Center, hired by the principal to investigate the strange occurrences associated with the old building. To make up for injuring his assistant and breaking his very expensive camera, Shibuya asks Mai to fill in. Mai, though attracted by his looks, doesn't completely trust Shibuya, thinking him arrogrant and egotistical.

Besides Shibuya, the principal has also hired Ayako Matsuzaki, a Miko who can exorcise spirits; Takigawa Houshou, a monk; John Brown, a Catholic priest from Australia; and Masako Hara, a famous psychic medium. Another student, Kuroda, who claims to be psychic joins them uninvited. Of course, each of them has a different theory as to what is causing all the odd happenings around the building. Shibuya, the logical and scientific researcher, believes that it is land subsidence. Hara-San detects no spirits, but Matsuzaki suspects poltergeists.

The answer is more complicated than any one theory, but eventually they figure it out. The ghost hunters leave and the school returns to normal. But then Mai gets a phone call from Shibuya--would she be interested in working for him permanently?

Volume 2:
Ewww! Creepy haunted doll! I'm not kidding--the minute you see this doll, you know it's possessed by an evil spirit.

Meanwhile, a film crew trying to film a romantic scene in the park is doused with water. Turns out there's a ghost of a young woman who was disappointed in love and now cannot stand seeing happy couples.