The Riddle of the Hidden Treasure
Nick, Katie and Laura are so excited to hear of the missing Greylings Treasure that when they stay with Laura's grandpar... MoreThe Riddle of the Hidden Treasure
The Riddle of the Rajah's Ruby
When Nick and Katie's friends, Sophie and David, inherit a mysterious cursed ruby it causes all sorts of trouble for the... MoreThe Riddle of the Rajah's Ruby
The Riddle that Never Was
Katie and Nick idolise their Uncle Bob - he's a private investigator and solving riddles is their favourite thing to do.... MoreThe Riddle that Never Was
The Riddle of the Boy Next Door
Laura and Katie, and especially Nick, are excited when the fun-loving Kit moves next door with his American accent and r... MoreThe Riddle of the Boy Next Door
The Riddle of Holiday House
Katie and Nick are excited to spend their summer at Holiday House with its kind owner Mrs Holly, her bossy daughter Clar... MoreThe Riddle of Holiday House
The Riddle of the Hollow Tree
When Nick and Katie lose their parents in a car accident they are distraught to be living with their cruel Aunt Margaret... MoreThe Riddle of the Hollow Tree
