Paperback, First Edition, By Susan Cooper. Aladdin, 1995. Your complete satisfaction is fully guaranteed, as usual.
From School Library Journal
Grade 4-7-- The Volnik family inherits a rundown old castle on an island off Scotland and visits their new property. After returning home, 12-year-old Emily and 10-year-old Jessup notice strange things happening. Their detective work eventually discloses the cause--a mischievous boggart has accidentally become trapped in a piece of furniture the family shipped home to Canada. Unfortunately, no adults believe them. The children claim innocence on Halloween night as pieces of furniture fly through the air and a bucket of water soaks their mother. Eventually, the boggart's pranks begin to cause serious problems; he becomes intrigued with the power of electricity, and causes a traffic accident that lands Emily in the hospital. Finally, he learns to communicate with the children by computer, causing the message-- "I want to go to my own country"--to appear in Gaelic on Jessup's screen. When he gets trapped in a black hole in a computer space-adventure game, the youngsters devise a daring, risky, and ultimately successful plan to help the boggart return home. The novel is fleshed out with numerous, vividly realized secondary characters, including various actors at the Chervil Playhouse, where Mr. Volnik is artistic director, as well as the novel's true villain, Dr. Stigmore, a psychiatrist and a parapsychology scholar who insists that Emily is a troubled adolescent in need of hospitalization. The intelligently thought-out clash between the ancient folkloric creature and modern science guarantees a wide audience. A lively story, compelling from first page to last, and a good bet for a read-aloud. --Ellen Fader, Westport Public Libr