Once Upon a Time is a selection of seven Persian folktales. These tales have been selected for intermediate and advanced learners of the Persian language. A simple and easy language has been used to rewrite these stories with the intent to stay as close as possible to the narrative tone of the original texts. The selection starts with shorter and simpler stories, so that the readers could eventually elevate their reading and comprehension skills. The new words in each story have been underlined and their English definitions have been provided under an index at the end of each story. It is...