Secret of the Runes is the tenth studio album by Swedish symphonic metal band Therion.

It's a concept album based on Norse mythology, where each song describes one of the nine worlds.

Cover artwork was made by Thomas Ewerhard[citation needed], it features nine Scandinavian runes, each corresponding to a certain mythological world.

Album also includes two cover versions as bonus tracks.

A music video was filmed for the Summer Night City cover.