Just finished this. I really found it a book of two halves -- the first half of the forced march through Malaya was really gripping and dramatic.
However, the second half (without giving too much away) really left a sour taste in the mouth -- its old-fashioned morality could be put down to the era when it was written, I suppose, but I found the overt, casual racism very off-putting.
It had been on my to-read list for years and I did enjoy the story, but wouldn't hurry to read anything by the author again.