And God Requireth That Which is Past broaches many controversial historical events during the Achaemenid Persian Empire. Although strongly based on academic sources, the narrative is still written in an entertaining, almost sensual manner. The romantic relationship of the two main characters, Mzysia, the spirited daughter of the Svan chief, and Kshayarsha, the fierce ruler of the Empire, is used as the foremost fabula of the novel to bring up the other, perhaps more vital issues of any time, such as: undying love, true friendship, dizzying adventures, distant travels, palace intrigues, dirty politics, bloody wars, early religions, origins of different philosophical trends, sex, homosexuality, the position of women in ancient societies and many other deeply motivating and actual matters that are more than presented in this work. This project is huge. It features 50 main and 400 secondary characters, all of them thoroughly researched. Geographically it covers the whole then existing world. The story starts in 503 BCE in the middle of Darius I reign, continues through Xerxes I entire time in power and ends in the fifth year of Artaxerxes I sovereignty in 460 BCE.