Another posthumous Donald E. Westlake novel has been published, and I've read it and added it to my annotated Westlake bibliography. I think the writeup communicates all I have to say about it:
Forever and a Death (2017)
Serious thriller novel, set in Australia, Singapore, and Hong Kong, written in the late 1990s but not published at that time. Based on an unused treatment for a James Bond movie, the novel removes Bond but leaves in the Bond villain, a businessman so over-the-top in his maliciousness that the cops disbelieve the heroes when they describe his deeds on the grounds that nobody would do that. The result has some of the mien of Kahawa without the humorous overtones, and the caper is the villain's not the heroes'. What it does have in common is being long but fast-paced, and in having an assortment of miscellaneous heroes, some of whom get killed. The leading hero - if he can be called that; much of his character arc is left out - is one of Westlake's ordinary men who under pressure discover a capacity for necessary ruthlessness, only this one is more plausibly presented than some.