Lilith, a romance

This is the story of Mr. Vane, the owner of a library that seems to be haunted by a former librarian. When Vane encounters this apparition he comes to discover that it knew his father who now resides in "the region of the seven dimensions." Vane follows the apparition through a mirror to this strange new world where he encounters the house of beds, the Little Ones, and Lilith, the princess of Bulika.