The Life and Doctrine of Saint Catherine of Genoa - Includes a biography, plus St. Catherine's "Spiritual Dialogue" and "Treatise on Purgatory." Available in several formats. - http://www.ccel.org/ccel/catherine_g/life.html
Catherine (Caterinetta) of Genoa, Widow - Biography of a remarkable woman who combined in her person the so-called active and contemplative lives. - http://www.saintpatrickdc.org/ss/0915.htm#cate
Patron Saints Index: Catherine of Genoa - Profile of the saint known as the Apostle of Purgatory (for her celebrated treatise on the subject). With links. - http://www.catholic-forum.com/saints/saintc35.htm
St. Catherine of Genoa - Mystic, author, d. 1510. Biography in the Catholic Encyclopedia. - http://www.newadvent.org/cathen/03446b.htm