This is, to my knowledge, the only written guide to El Camino San Olav, a 3-day walk from Burgos to Covarrubias, ca. 60 kms south, where a Norwegian princess from the 12th century lies in her sarcophagus in the church there.
It includes descriptions of every stage, including photos, distances, accomodations, and much more you will need to walk this Camino in confidence.
This is a free download for you.