Stephen Moss has written a book about the Atlantic puffin that is, at its core, about something larger: whether affection for a species can be converted into action before the species disappears. The structure follows a familiar arc in British natural history writing — cultural history first, ecological science second, cautious hope last — but Moss keeps the proportions honest. He doesn't oversell the puffin as metaphor; he lets the data do that work. The ecological argument is straightforward and well-supported. Warming oceans push sand eels — the puffin's primary food — out of range of breeding colonies. Adults fly farther, chicks fledge weaker, and winter storms finish the job. The prediction that 90% of puffins could vanish by mid-century is cited but flagged as 'hopefully pessimistic,' which is the right editorial instinct: alarming enough to matter, qualified enough to remain credible. The 2026 BBC report of hundreds of dead seabirds washed up across Cornwall, Scotland, and northeast England — with conservation organisations documenting over 20,000 stranded birds along Atlantic coasts of France, Spain, and Portugal — gives the abstraction a body count. Moss leans on two expert voices to anchor the book's final third. Peter Harrison, who has spent his career studying seabirds, provides measured optimism: the legal victory banning industrial sand eel fishing around England and Scotland, four decades of tracking technology revealing non-breeding movements, and the biological fact that small seabirds can live several decades, giving populations time to recover if pressures ease. Stephen Kress, the American scientist who pioneered puffin restoration techniques, provides the moral frame: 'We have an ethical responsibility as stewards of the Earth to do something where we can.' The book's strongest move is environmental historian Rob Lambert's framing of humanity's relationship with puffins as a shift 'from use to delight.' That phrase compresses centuries of exploitation — thousands harvested for food and feathers — into a single pivot point, and then turns the knife: we learned to love them just in time to threaten their existence through systemic negligence rather than direct harvest. The BirdLife Seabird Tracking Database material is the most technically interesting section, documenting how tracking technologies since the 1980s filled a 'huge void' in knowledge of puffin behaviour outside breeding season, ultimately identifying six previously unrecognised oceanic flyways. This is the kind of infrastructure work that rarely gets public attention but underpins everything else. Where the book is less convincing is in its final emotional appeal — that 'huge affection for the puffin, held by millions of people around the world, must surely count for something.' It must, but the mechanism connecting public affection to policy change is left undeveloped. The sand eel fishing ban is the one concrete example of sentiment translating into protection, and Moss doesn't push hard enough on what made that specific victory possible or replicable. This is a solid, well-reported natural history book that knows its form and executes within it. It won't change the genre, but it delivers exactly what readers of British nature writing come for: a specific creature rendered with care, placed in ecological and cultural context, and used as a lens onto a larger crisis without losing its own particularity.