While "The Unseen Coastline" focuses on the hidden world, "A World Between" emphasizes the unique particle size composition of these shores. Here's a revised description within 150 words: "A World Between: The Ecology of Intermediate Particle Size Shores" delves into the fascinating realm where land and sea meet. Forget the familiar sand or pebbles - this book explores the unique ecology of shores dominated by gravel, cobbles, or a mix of sizes. Discover how these "in-between" shores create a challenging yet rich habitat. Explore the specialized creatures that thrive here, the intricate food webs they sustain, and the vital role these "in-between" environments play in coastal ecosystems.