GlossaHouse has published a book to which I and several others contributed — The Letters of Ignatius: Apostolic Fathers Greek Reader. Brian Renshaw and Shawn Wilhite did the herculean task of editing and typesetting the book. Both Brian and Shawn have posted about how the project came about. The remaining volumes in the series should be out within six months or so.
You can purchase the book for less than $10 on Amazon.