Gentlemen, on which occasions should you wear ties with vertical stripes? Hawaiian shirts? Or snakeskin shoes? Unsure? Read on...
First, let's make an important point: don't take this book too seriously. Truthfully, it does contain some wonderful nuggets of advice (some of which, including "no level of fitness - or, for that matter, drunkenness - justifies wearing a tank top at home" will have you nodding and laughing in agreement), but its design reminds me of one of those books of famous quotations you read for a private chuckle whilst attending to more important matters in the house's smallest room.
All that said, this could be the best nine quid you've ever spent if you're unsure of what to pack for a two-day business trip, or the age at which wearing a fedora becomes acceptable.
Incidentally, the answer to all three of the questions at the top of this review: "never". Award yourself a cheap bottle of aftershave for each one you got wrong.