See this online text:

See also the ebooks listed on the page Church and Ecclesiology and Early Christianity, as well as the following texts:

On the Feast of St. Ignatius of Antioch in the Latin church. For other texts and ebooks, you may access the List of Free eBooks (Arranged by Title), the List of Free eBooks (Grouped by Subject), the List of Worth-It Catholic Books & eBooks, and the main page of the Catholic eBooks Project.