Eight-year-old Lucas, Prince of Wrenly, is eager to explore and Clara, daughter of the queen's seamstress, knows the kingdom well, so they team up to find a lost jewel and visit all of the land's main attractions as they search.

When a legendary sea monster starts making waves in the Sea of Wrenly, Prince Lucas and his friend Clara travel to the Island of Primlox seeking information that might help them calm the beast.

"As Lucas and Clara set out to investigate some mysterious happenings in Wrenly, they discover a young horse with wings that is lost and in danger"--

Mischief-makers Prince Lucas, his best friend Clara, and Ruskin the scarlet dragon learn to respect the hard work of others when they are sent to Flatfrost to fetch more ice from the giants who live there.

There is only one place throughout the entire Kingdom of Wrenly that no one dares explore: the Dream Portal. Hidden beyond the swamps of Bogburb, this strange and ancient circle of stones was built by wizards before time began. Stories of great danger surround the mysterious monument. But when their dragon friend, Ruskin, falls under the Dream Portal's spell, Lucas and Clara will risk the legendary peril to save him.

The people of Wrenly have always believed that goblins are dangerous creatures who were stripped of their magical powers by wizards after the Goblin Battles; and when Prince Lucas and Clara follow a young goblin, Zark, who has come from the wizard Grom, they find themselves captured by the goblin leader Golart, who has taken over Hobsgrove--but Grom has a plan, and it requires that the children put their trust in Zark.

The gnomes of the Stone Forest are in trouble when all the gems in the forest lose their shine, so Prince Lucas and Lady Clara help the gnomes before their home changes forever.

"Ruskin, the pet dragon of the royal family of Wrenly, forms new friendships with the dragons of Crestwood and goes on exciting adventures"--

"Forgotten dragons, cursed to live in the shadows. When Ruskin and his friends discover the lost world of Shadow Hills, they risk it all to help save the forgotten dragons living there. But can they save Shadow Hills without destroying Wrenly?"--Page [4] of cover.

Lucas and Clara are floating on a raft when a wave casts them into the sea, where Lucas catches a glimpse of a coral kindom and a dark-haired mermaid helps him, but when his father, King Caleb, hears of this, he scolds Lucas and tells him he has broken an age-old pact.