Book excerpt: Meara's Grandad lives by the mysterious lake of Loughareema. Some days it's full and shimmering, and some days it's completely empty! Grandad has plenty of stories about why it vanishes. Is it mermaids? Narwhals? Giants? Meara doesn't believe any of these stories, but with a little imagination she may eventually discover the 'real' reason ... Dive into author-illustrator Paddy Donnelly's captivating tale, a celebration of a young girl's determination, a granddad's wisdom, and the fantastical wonders of the natural world.