Rainbow Books Official printed texts or collections of diplomatic documents, appearing on an ad hoc basis treating primarily questions of foreign policy. A government published “rainbow books,” frequently during or after an international crisis, in order to inform its parliament and/or public, to legitimize its own policy, and/or to criticize the policy of a foreign state. The books owe their name to the colors of their bindings, used on a consistent basis by the various governments: Great Britain blue; Germa…