Gilbert Keith Chesterton 
Heretics and Orthodoxy [EPUB ebook] 

G. K. Chesterton’s Heretics was first published in 1905, with Orthodoxy following in 1908.  Chesterton viewed them as companions to one another, as Orthodoxy was written as a response to criticism he had received for Heretics.  For while Heretics presents the negative view of Chesterton’s beliefs, Orthodoxy presents the positive; in a sense, Heretics contains the anathemas while Orthodoxy contains the canons.  Orthodoxy is therefore an apology, or defense, of the apostolic Christian faith as told through Chesterton’s own journey to the faith.  Chesterton wrote both while he was an Anglican, but he converted to Roman Catholicism in 1922.  

This edition contains both Heretics and Orthodoxy while preserving Chesterton’s original text (and British spelling conventions).