A legendary book by Promised Messiah and Mahdi Hadrat Mirza Ghulam Ahmad. The book foretells about coming Plagues, Wars and natural disasters reminding the time of Prophet Noah (as) that if you people did not came under the one true divine fold then you would be the one bearing all the hardships and results. Telling that a God guided person Promised Messiah and Mahdi has arrived and you have to believe him so you would embark in Noah's Ark and be saved from all evil. I would urge you must read.