Prince Martin and the Cave Bear

"The circus has arrived at last. Prince Martin and his cousin, Princess Margaret, have a glorious time - until they see a scary Northman selling a blind bear cub into captivity. When the kids intervene, the Northman's cryptic threat chills their blood... But with the help of old friends, they hatch a plan to rescue the cub - and take him home to Northland, where the colossal creatures are bad...and the Northmen are worse. Can the companions brave the perils of Northland to complete their quest?"--Publisher's description.