Junior Agent Jack and the Loch Ness Mess

When Jack is recruited for a Secret Service mission by his maths teacher, things don't entirely go to plan and he is determined to put things right. But the stakes are high. If he fails, he loses his chance of obtaining Junior Agent status, his teacher loses his chance of reinstatement to MI6, but, worst of all, they risk revealing the existence of the Loch Ness Monster.