Ripley's Bureau of Investigation is a series of children's fiction books published by Ripley Publishing in the United States and distributed by Random House in the United Kingdom and Icewater Press in Australia.
Two later books in the series, Danger Underground and Haunted Hotel, remained unpublished until they recently appeared exclusively on the children's reading app, Pickatale.
[4] The series was intended to have twelve books in total, but it discontinued, likely due to low sales.
The series follows seven extraordinary pupils at the fictional 'Ripley High', based on "Ripley's Believe it or Not!"
[7] Other regular characters include the teachers Mr Cain and Dr Maxwell, who assist the RBI in their missions.