Requires prior general knowledge of the subject.
Readers with knowledgeable about the subject matter.
Contains doctrinal errors of some importance.
Whilst not being explicitly against the faith, the general approach or its main points are ambiguous or opposed to the Church’s teachings.
Incompatible with Catholic doctrine.
This work deals with the more positive aspects of the lives of certain royal couples, but hardly noting some rather well-known defects. D.V.