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repeated in disgust. ‘That’s so gross!’
    â€˜Not really,’ said Elly. ‘Mum worked out that dust is just tiny flakes of stuff from around the house. She fills the Wunch-Box up with dust she’s collected from the kitchen and the Wunch-Box just sorts through the pieces.’ She took another bite. ‘Plus, it’s not human dust. It’s fairy dust, which is much cleaner.’
    Jess looked at the remains of the cupcake in her hand. It didn’t look nearly so delicious anymore. ‘I think I’ll just stick with my sandwiches,’ she said. She didn’t fancy eating dust food no matter whose dust had been used. Dust food was the sort of thing you only gave to people you didn’t like.
    This gave Jess an idea. She nudged Elly. ‘I dare you to go and offer them to the Fairy Club,’ she said, smiling mischievously.
    Elly got up. ‘Good idea!’ she said. ‘We’ve got way too many here.’ And she walked over to the Fairy Club girls before Jess could stop her.
    Jess stopped smiling and started feeling bad. She hoped the dustcakes weren’t poisonous. She watched as the Fairy Club girls each chose a cake. She could tell from their faces that Elly hadn’t told them what the key ingredient was. She could also see that they thought the cakes were delicious. Especially Caitlin. Once she’d finished her first cake she took another one. Jess saw her say something to Elly. Then she handed her a piece of paper. What on earth could it be?
    Elly rushed back a moment later, looking very excited. ‘Caitlin’s invited us to a Fairy Club meeting this weekend!’ she said.
    Jess shook her head. ‘No way,’ she said, firmly. ‘I refuse to go to some stupid fairy party.’
    Elly hopped around on one foot. ‘But Jess, I really, really want to go. She’s even given us an invitation,’ she said, holding it out. It was pink and covered in little gold wands and stars. Looking at the invitation made Jess want to go even less. But it was hard to say no when your friend was so excited.
    â€˜We’d have to dress up, you know,’ Jess warned Elly.
    Elly nodded enthusiastically. ‘I’ve always wanted to go to a fancy-dress party!’ she said.

    Jess sighed. ‘You don’t get it,’ she said. ‘We’d have to dress up as fairies .’
    But even this didn’t seem to worry Elly.
    â€˜I don’t understand why you’re so keen to go to a fairy party,’ Jess said. ‘I thought you hated all that stuff.’
    Elly nodded. ‘I do,’ she said. ‘But when you’re a detective you sometimes have to do things you don’t want to do.’
    Jess looked at Elly suspiciously. She wondered if Elly was trying to trick her. ‘Have you found a clue?’ she asked.
    Elly leant in and whispered in her ear. ‘Have you noticed that for someone with very pale skin Caitlin has hardly any freckles?’
    Jess stared at her.
    â€˜And that her hair is really, really shiny?’ Elly added.
    Jess felt a shiver of excitement. She looked over at Caitlin and noticed for the first time that she was much shorter than any of the other Fairy Club girls.
    â€˜You think she’s a ...?’ she whispered.
    Elly shrugged. ‘That’s what we’re going to find out on Saturday,’ she said.

Chapter Seven

    T he first class after lunch was cooking with Mrs Snidely. Elly decided to try very hard in this class to get on Mrs Snidely’s good side. Since the skateboard incident in the hallway she had the feeling that the cooking teacher didn’t really like her very much.
    â€˜Don’t worry,’ Jess said, as they walked to class. ‘Cooking is pretty fun, really, even if it is with Mrs Snidely. And it’s easy.’
    But Elly wasn’t so sure. ‘It’s the boy-fairies that do most of the cooking in Fairydom,’ she explained. Some