From the publisher, terra authentica: We are reliving the year 1690. In the dry area of the mountainous region of Djebel Akhdar in the Sultanate of Oman four families of farmers create the oasis of Al Aflaj. For the transport of natural water they build wells and channels. The farmers divide the land into separate fields, on which they plant vegetables, fruit and date palms. As water is rare and very precious the farmers must keep an eye on an effective irrigation. A system ruling for generations regulates the quantity of water each farming family receives at a certain time of the day. At the end of the season the farmers will follow an Islamic principle: divide part of your revenue among your less fortunate fellow believers.