Reading progress update: I've read 40 out of 228 pages.

‘Damned ingenious!’ cried Ingles approvingly.
‘Yes, he is clever, Number Four.’
‘As clever as Hercule Poirot?’ I murmured.
My friend threw me a glance of dignified reproach. ‘There are some jests that you should not permit yourself, Hastings,’ he said sententiously.
Gee, Poirot really does not cut his friend any slack.