http://gen.lib.rus.ec/book/index.php?md5=C225175F678EEE404862497D2B899E25
>Nicholas Tomalin and Ron Hall - The Strange Last Voyage of Donald Crowhurst (published in 1970, 2016 edition)
>Crowhurst's behaviour as recorded in his logs indicates a complex and conflicted psychological state. His commitment to fabricating the voyage reports seems incomplete and self-defeating, as he reported unrealistically fast progress that was sure to arouse suspicion. By contrast, he spent many hours meticulously constructing false log entries, often more difficult to complete than real entries due to the celestial navigation research required.
>The last several weeks of his log entries, once he was facing the real possibility of winning the prize, showed increasing irrationality. In the end, his writings during the voyage – poems, quotations, real and false log entries, and random thoughts – amounted to more than 25,000 words. The log books include an attempt to construct a philosophical reinterpretation of the human condition that would provide an escape from his impossible situation. It appeared the final straw was the impossibility of a noble way out after Tetley sank meaning he would win the prize and hence his logs would be subject to scrutiny.