Marco Polo Day contest rules

Marco Polo Day on Twitter is a collection of individual contests. Each MARCO! tweet is a separate contest. Participating authors are wholly responsible for running their individual contest and fulfilling the prize requirement. Winners shall receive one digital copy of a book from the author. Titles available are at the sole discretion of the author and may not be substituted for a cash or physical prize. Prize value is not to exceed $10 (US). is not responsible for prize distribution except in those contests run on the Twitter account of @voireylinger.