Haha, nice, the Dover edition of that book's my current in-an-outdoor-setting-while-the-kids-play read, though that season's only just started so I'm not far in yet. Love me some Chesterton.
I went through The Man Who Was Thursday after it was referenced in Deus Ex (2000). Unfortunately it was a bit too surreal for my reading-for-fun tastes. Still, he's got quotable stuff.