I could never really believe in Casson and his hunt for a blackmailer. It didn't matter how often the narrator justified his actions, and he seemed intent on justifying them every few pages, there was very little about Casson's behaviour which made any sense: his motivation seemed irrational, his confidence in his own conjectures seemed delusional, and his willingness to neglect his business while devoting his time and money to the search for a blackmailer defied belief. With every advancing page, all I could see were the flaws. Continued