Wonderful. Chesterton's prose is dazzling. His use of color and imagery is fresh and lively. The pace is almost frenetic. There is nothing musty about this novel, so give it a try.
Keep in mind, though, it's not a "straight" novel--more of an allegory. But that will only disappoint people obsessed with realism.
It seems he only wrote four or five novels. Pity.
I will read the rest as time allows.