The book "Guardian of the Door" by the famous Australian writer Ethel M. Dell is an exciting detective story intertwined with elements of mysticism and fantasy. The main character, a young girl named Eleanor, finds a secret door in the family compound that leads to unknown worlds. During her journey, Eleanor encounters supernatural forces, mysterious creatures, and threats that she must overcome in order to uncover the secret that lies behind these doors. To disable the guardian of this door and find out what secrets and adventures await her in this mysterious world, Eleanor must show all her courage and courage. The book "Guardian of the Door" is full of mystery, stunning emotions and unpredictable turns of events that will captivate the reader from the first pages.