This book is a reprint of a book on Irish Martyrs which was published in 1896. It includes accounts of the suffering and martyrdom of the Irish clergy and people during the Reformation and Penal times.
See http://www.irishcatholic.ie/site/content/our-martyrs-record-those-who-suffered-catholic-faith-under-penal-laws-denis-murphy-sj for details on how to purchase book
See http://www.newadvent.org/cathen/08163a.htm for more details on the sufferings and cause of Irish Martyrs and Confessors. This page includes a list of the acknowledged Irish matyrs from the reign of Henry VIII to the Penal times.