Birth of a State; the Anglo-Irish Treaty, Micheál Ó Fathartaigh and Liam Weeks (Irish Academic Press, €19.95/£17.99) The Treaty: the gripping story of the negotiations that brought about Irish independence and led to the Civil War, Gretchen Friemann (Merrion Press, €16.95) Apart from two commemorative stamps issued by An Post, the centenary of the signing of…