THE MAGIC KINGDOM by Richard Hills

In The Magic Kingdom, Jack and Jill enter a wood where they find Red Riding Hood, a wolf, Goldilocks and three bears and Edna, the two faced Witch. They also come to a village which is in the Kingdom of King Arthur.

Sir Lancelot was sent to take Queen Guinevere to Gwed, but was attacked by a Giant Tin Man, employed by Edna. When he recovered he found that Queen Guinevere was missing and so returned to tell King Arthur.

King Arthur sends his Herald to The Black Mountains in search of Queen Guinevere. He then decides to go himself with his yeomen when he learns that Edna may be the cause of all the trouble.

They all have lots of adventures in the Black Mountains, and it is only when they find Merlin, everything is put to right and Edna, The Witch is banished from the land, and Queen Guinevere is found, They all return to The Magic Kingdom, and Merlin helps Jack and Jill to leave the wood.