The Plot Against Roger Rider

I thought this was mostly average going and then with about 30 pages left I thought I twigged what the twist was going to be, or at least I came up with a twist and hoped that the book was leading that way (Geoffrey Paradine and Amanda contrive to murder Roger for revenge and his money but make it look like Roger has faked his own death. The body in the water is actually Roger but they had Hubert break into the dentist office in Australia and put Rider's dental charts in Summers' file and make some other paperwork disappear. The police are lead to believe that Roger is on the run after faking his death and go down that investigation, leaving Geoffrey and Amanda to get away scot free.)

There are some scenes that wouldn't make sense with that twist - Amanda breaking up with Geoffrey for one - but I liked my idea better. The reveal of the culprit was disappointing in the end.