Impossible Crime Fiction: G. K. Chesterton 
Where Chesterton stands in the development of the "impossible crime" mystery.
http://members.aol.com/MG4273/hanshews.htm#ChestertonThe Man Who Was Thursday: Revisiting Chesterton's Masterpiece 
Martin Gardner considers Chesterton's book, in an essay on Nature, free will, and evil. From Christianity Today, May/June 2000.
http://www.christianitytoday.com/bc/2000/003/10.30.html
The Man Who Was Thursday 
Brief review by Greg Slade.
http://www.swcp.com/christian-fandom/chesterton2.html
Utopia of Usurers 
Peter Chojnowski reviews a republication of this collection of essays which reveal Chesterton's thoughts on the dangers of unfettered capitalism.
http://www.sspx.ca/Angelus/2003_May/Utopia_Usurers.htm
The Catholic Church and Conversion 
Robert Miner recalls his chance encounter with this book, which was his introduction to Chesterton.
http://www.catholic.net/rcc/Periodicals/Dossier/1998-05-06/conversion.html
The Everlasting Man 
Why, if Fr. Phil Bloom were stranded on a desert island with one book other than the Bible, he would choose this one.
http://www.geocities.com/seapadre_1999/chesterton.html
Internet Archive: G. K. Chesterton: A Critical Study 
E-text, 1915 by Julius West. Recognizes that much of Chesterton's writings defy simple genre classification.
http://www.archive.org/details/criticalstudy00westuoft/