The book was originally planned under the title «The Imp is the King’s Counselor or The Demon’s Rival». The story of Princess Estella, who released a treacherous demon from her trunk, is described in the book «The Simple Princess». The Mind acts in the books «The Palace is Inside the Whale», «The Amarantha’s Tapestry», etc. Serpin’s acquaintance with the fire fairy and the fairy of mists and the Mind’s stealing of the treasure from Opal is described in the book «The Dragon Ship.»
The goddess Alais is described in the book series «Daughter of the Dawn.»
The girl on the cover of the book «Demon’s Rival» – author Natalie Jacobson as Samantha.