Midnight Mansion - Sue Graves

Dangerous Games is a range of adventure stories aimed at reluctant older readers. The series is set in a computer games company and follows designers Sima, Kojo and Tom. Each story sees them designing and developing a computer game which they then enter for real - encountering exciting and sometimes deadly situations... Tom is delighted to discover extra gagdgets have been built into a new computer game about a haunted house. But the special equipment doesn't help when the ghosts decide they don't want the three players to leave!