A fun and irreverent approach to teaching readers about the Vikings who attacked Ireland in the 8th century. By emphasizing their "deadly" attributes such as warriors, ships, and weapons, it likely aims to pique readers' interest and engage them in learning about history. While presenting the Vikings in a humorous light, the book likely also delves into more accurate historical details, shedding light on the complexities of their actions and motivations beyond the common stereotype of marauders. In this way, it offers an entertaining and educational exploration of this historical period.