Hartas

The Mystery of the Secret Room: Book 13 (Adventure Island)

By Moss, Helen, Hartas, Leo, Knipe, Roy

The Mystery of the Dinosaur Discovery: Book 7 (Adventure Island)

By Moss, Helen, Hartas, Leo, Knipe, Roy

The Mystery of the Black Salamander: Book 12 (Adventure Island)

By Moss, Helen, Hartas, Leo

The Mystery of the Smugglers' Wreck: Book 9 (Adventure Island)

By Moss, Helen, Hartas, Leo, Knipe, Roy

Space Explorer Atlas

By Platt, Richard, Hartas, Leo

Zombierella: Fairy Tales Gone Bad

By Coelho, Joseph, Hartas, Freya

The Great Rescue: Book 7 (Sam Silver: Undercover Pirate)

By Burchett, Jan, Vogler, Sara, Hartas, Leo

The Mystery of the Midnight Ghost: Book 2 (Adventure Island)

By Helen Moss, Moss, Helen, Hartas, Leo

It's Me in the Jungle (It's Me Sprog & Dog)

By jane launchbury, Launchbury, Jane, Hartas, Leo

The Mystery of the Missing Masterpiece: Book 4 (Adventure Island)

By Moss, Helen, Hartas, Leo

The Mystery of the Phantom Lights: Book 14 (Adventure Island)

By Moss, Helen, Hartas, Leo, Knipe, Roy

The Mystery of the Vanishing Skeleton: Book 6 (Adventure Island)

By Moss, Helen, Hartas, Leo

Adventure Island 13: The Mystery of the Secret Room

By Moss, Helen, Hartas, Leo, Knipe, Roy

The Mystery of the Hidden Gold: Book 3 (Adventure Island)

By Moss, Helen, Hartas, Leo

The Mystery of the King's Ransom: Book 11 (Adventure Island)

By Moss, Helen, Hartas, Leo

The Golden Horsemen of Baghdad (Flashbacks)

By Pirotta, Saviour, Hartas, Freya

Adventure Island 14: The Mystery of the Phantom Lights

By Moss, Helen, Hartas, Leo, Knipe, Roy

Adventure Island 11: The Mystery of the King's Ransom

By Moss, Helen, Hartas, Leo

The Double-cross: Book 6 (Sam Silver: Undercover Pirate)

By Burchett, Jan, Vogler, Sara, Hartas, Leo

The Deadly Trap: Book 4 (Sam Silver: Undercover Pirate)

By Burchett, Jan, Vogler, Sara, Hartas, Leo

Around the World - A First Picture Atlas (What's going on?)

By Hook, Sue, Payne, Colleen, Hartas, Leo

King Arthur's Spaceship

By Yeoman, John, Hartas, Leo

Adventure Island 12: The Mystery of the Black Salamander

By Moss, Helen, Hartas, Leo

King Arthur's Spaceship

By Yeoman, John, Hartas, Leo

Sam Silver Undercover Pirate 6: The Double-cross

By Burchett, Jan, Vogler, Sara, Hartas, Leo, Hartas, Leo

Dragon Warriors: Dragon Warriors No. 1

By Morris, Dave, Hartas, Leo, Harvey, Bob

Princess Puzzle Book (Puzzle Books)

By Hartas, Leo

Mimi and the Dream House

By Waddell, Martin, Hartas, Leo

Mimi's Christmas

By Waddell, Martin, Hartas, Leo

Skeleton Island: Sam Silver: Undercover Pirate 1

By Burchett, Jan, Vogler, Sara, Hartas, Leo