In at least one hundred words, explain the basic structure of 1001 Nights

It is a group of stories which are interrupted by "Scherazade saw morning and discreetly fell silent" The following night the story telling begins right after the interruption. The interruptions are based on the length of the story and during some nights 2 or 3 short stories are told. Some of these stories are organized into groups such as "Garden of verses". Many of the stories take place during the time of Haroun, Caliph of Bagdad. It is on 1001th night that all the stories have been told ... If you put together the first line of each of the poems, you get a final story, which is #1001, hence the title. Each of the poems was written by a different Persian poet in the 15th through 18th centuries and later translated into English. Most of them deal with legends from the Mongol Empire that were told by troubadours along the trade routes of Bucharest and Kamchatka.