A book, often bound with a red cover, or online equivalent, that is an official, or canonical, collection of data, regulations, or writings.
All the chauntry preestis whos composicions are enrolled in the rede boke. T. Smith & L. T. Smith Eng. Gilds (1479, ed. 1870, p. 419, cited after OED)
A book supposedly belonging to the devil and containing the signatures of those in league with him.