As a young soldier on the battlefields of Gallipoli, Sydney Loch witnessed the horrors of war firsthand. On his return to Australia, he wrote an account of all he saw, describing his work as fiction to evade censorship. As the war ground on abroad, Sydney's book, The Straits Impregnable, garnered widespread acclaim. But when the publisher revealed that it was a work of non-fiction, Australian military censors swiftly ordered it to be withdrawn from sale, and the book vanished. Now, historians Susanna and Jake de Vries have unearthed Sydney's book for a new generation. To accompany it, they have written a biography of the remarkable life of Sydney Loch: soldier, writer, humanitarian.