Bristow's book suffers from some of the same bad writing skills many technical books suffer from.
Then on top of the fact that they can't string a sensible sentence together they don't even bother to proofread it either. Shocking. They should get real artists like E K Gann or even Davies to proofread and correct their crappy use of language. ( Both this world departed unfortunately) My Korean TV manual uses better language!!
Apart fom that however the idea of the book is great - and there is alot of usefull info in it. Maybe all the mistakes were put in on purpose to keep us on our toes!!