I would like to nominate We
by Yevgeny Zamyatin.
This book has been called the grandfather of dystopian fiction, directly influencing George Orwell's 1984
, Aldous Huxley's Brave New World
, Ursula Le Guin's The Dispossessed
, Ayn Rand's Anthem
and Kurt Vonnegut's Player Piano
Although the Russian work is probably in the public domain, the English translations are not (as far as I know). However, there are 3 different versions that seem commonly available at different prices.
Amazon US (1)
Amazon US (2)
Amazon US (3)