Treasure - Book 2 - the Guardians Trilogy

Richard, Templar Priest and Knight of St Andrew, has a mission to fulfil. He is the last of his kind, entrusted by King Baldwin and his family, the MacPherson Clan, to protect humanity, and Heaven.
He saves Ethan Henry, son of Jacob, in his time - 1179,he was in the right place at the right time, but he isn't the only Being that has been looking for Ethan.
Ethan isn't sure of his destiny. When he meets the Templar Knight he can feel things changing. In his family you only fight, but maybe Heaven has something else in mind for him.
Serendriel is a misfit Angel, finding Ethan and getting him to safety is his last chance. Serendriel isn't like other Angels. Antares, The Watcher, is grateful that he has been chosen to protect Ethan Henry. With the Henry's, Serendriel and Antares find the one thing they have been missing, family.
Ethan Henry and Richard have to retrieve the Templar Treasure from Jerusalem; one cannot do it without the other.
They must succeed, Heaven and all of humanity depends on it.