The Utgarda Trilogy Omnibus contains the first three adventures of Russian anthropologist Anna Rykov, doctor Harry Lamb, and Father Sean O’Malley: The Old Man's Request, The Missing Medium, and The Other Realm. Also included are original character concept descriptions, monster concept images, the map of Brian Teplow's imaginary world, and cover concept drawings.

Fifty years ago, a group of college friends dabbled in the occult and released a malign presence on the world. Now, on his deathbed, the last of the students, now a trustee of Reister University enlists the aid of three newcomers to banish the thing they summoned.

While Father Sean O'Malley is summoned to Rome to discuss the "Longborough Affair" with his superiors, Russian anthropologist Anna Rykov and Doctor Harold Lamb travel to New York City where they encounter merchants, mobsters and madmen in pursuit of the spirit medium who advised their mentor shortly before the start of the whole adventure.

Having discovered the location of Brian Teplow, Russian anthropologist Anna Rykov, doctor Harry Lamb, and Father Sean O’Malley travel to a secluded asylum to collect him.

But things are not so simple, and Anna must travel to the land of Teplow’s imagination to rescue him, where she finds a different world from the one suggested in the Missing Medium's journals.

After dreaming that her alter-dimensional sister Sobak was in danger, Anna Rykov is sent to Depression era Boston to find and kill the shape shifting alien who has captured her, and whose plans could bring about the extinction of all life on Earth. Anna is assisted by Cletus the hound and a homeless a World War I veteran with skeletons in his own closet. However, Anna's inquiries catch the attention of J. Edgar Hoover, whose motives in this case are unknown.