Just finished reading (well, listening to) this and I've been blown away. It highlights how much of the original Oxford dictionary was shaped by a white, male, and middle- to upper-class perspective. But it does it without battering you with polemic, instead drawing out the themes through the engaging and highly believable story of one young woman (a girl at the start).
I see one commentator on this site is complaining that their reading has been 'ruined' by the (few and deftly-placed) occurrences of 'obscene' words. As a way to demonstrate that you've completely missed the point of the whole book, that's hard to beat.
100% recommended.