Here are the technical details in English for the Faber & Faber edition (ISBN 0571084834):
A gripping psychological thriller set during an unspecified war: when a group of British schoolboys become stranded after a plane crash, they attempt to form a democratic society symbolized by a conch shell, but fear, power struggles and descent into violence reveal humanity’s darker instincts.
Number of pages: 176 (Faber & Faber import/ later printing paperback, Jan 1 1973)
Publication date: January 1, 1973 (later printing, originally published 1954)