Context:

A book that Henry Lincoln read while on holiday in 1969, which told him about the mystery of Rennes-le-Chateau and inspired him to investigate the Priory of Sion.

Context:

One of several books mentioned that Gérard de Sèd wrote about the Cathars, demonstrating his obsession with the subject.

Context:

One of several books mentioned that Gérard de Sèd wrote about the Cathars.

Context:

One of several books mentioned that Gérard de Sèd wrote about the Cathars.

Context:

One of several books mentioned that Gérard de Sèd wrote, translated as 'Occitania in revolt in the Middle Ages.'