"Slightly outdated, single sided perspective"
If you want a lengthy account of the month of August 1914 from an Anglo-Saxon point of view, this book is for you.
While a lot of sources are cited, this is more of a narrative than a scientific account. It tells a good, if somewhat one-sided story. In this sense, the book feels a bit outdated as the last years of thinking about WWI are not reflected. In language and content, it is still in the tradition of the WWII generation, meaning more anti-German in spirit, language and interpretation of events than recent historians. If you don't mind this and you want to be entertained by history in a detailed account, this is a good (audio-)book.
About the audio: The narrative is likeably and I feel the speaker matches the writers style. Unfortunately the pronunciation of French and German is poor and where foreign accents in English are emulated from supposedly native Russian, German and French speakers it becomes simply annoying. Somebody who obviously does not speak these languages simply cannot bring across the accents properly (especially to someone like myself who is not a native speaker of English). It would have been a much better – if more costly – choice to have these parts spoken by foreign (and male) speakers to contrast narrative and citation.