David Tremain and the Lost Horses

Returning victorious after his school's win at the Trans Tasman Interschool Equestrian Trophy, David is faced with a terrible discovery.
His beloved horse, Midnight, has been stolen, and the selfish stable foreman, Jake "the Snake" Gibson, is missing.
Unwilling to wait on authorities, David, along with his friend Alex, and Richard's brother, Andrew, embark on a rescue mission. A mission that will take them the length of the South Island, and uncover a smuggling operation.
But can they rescue the horses before it's too late?