The book is published by Catarata Publishing Company together with the Euro-Arab Foundation and tells the story of Housam "Sam" Najjair, born in Dublin to an Irish mother and a Libyan father. In June, 2011, when the civil war began to devastate his father's homeland, Sam left Ireland and headed to Libya —vía Tunisia— in order to join the uprising against Gaddafi. Lions of the Tripoli Brigade is about the story of his trip to Libya starting from his arrival to that country, where he spent two weeks training in the mountains before heading to Tripoli.