Ranulph Fiennes writes a cogent, exciting account of the Polar career of a great hero - Robert Falcon Scott. While I suspect that Fiennes is a tad biased in his unerring support of Scott, nonetheless his version of events is likely to be much closer to the mark of reality than many previous accounts, some of which have sadly targeted Scott for ridicule and retribution, presumably with the aim of bolstering book sales.
Fiennes has been there and 'done it' himself, so he offers an almost unique and undoubtedly well informed standpoint when debating the decisions that Scott made, the mental and physical hardships that Scott and his men endured, and the interplay of personalities during the Discovery and Terra Nova expeditions.
If you want to know the truthful facts behind the famous journey to the South Pole by Scott, detailed insights into his personality and the related stories before and after the fated 1911-1912 expedition, get this book, 'Race to the Pole' (or 'Captain Scott' - I believe the British published version). Don't get any of the many books from those authors that, in contrast, base their opinions on ignorant conjecture.