Shy mermaid Atalanta Scrimshaw must break out of her comfort zone when unscrupulous developers threaten to transform her home into a seaside golf resort. Dive into a mermaid's diary and discover all the underwater secrets in this fantasy adventure from Chris Riddell, fully illustrated in black and white throughout.

Meet shy mermaid Atalanta Scrimshaw. She lives in the quiet backwater of Sleepy Cove, collects messages in bottles, rides seahorses and enjoys the hobby of ‘walking’ on the beach and visiting friends. Life is perfect, until Atalanta learns of plans by developers Bristle & Splinter to transform Sleepy Cove into a luxury, seaside golf resort. Realizing that this plan will destroy her home, she enlists the help of her friends, old and new, to try to stop it . . .