I have posted this in a few places its a heads up and may only effect me then again it has come from the UK source printers. My copy is 3rd edition and noted as 2011 re-print.
I purchased Model Engineers Handbook by Tubal Cain 3rd edition some 3 yrs ago only ever flipped through it. Last night I dragged it off the shelf to do some ground work on electrics which is section 12 of the book. No section 12 not even section 11 or 13 I thought I was going bonkers as all I kept seeing was section 8, 9 & 10 yep they had bound the book with double those sections left out 11, 12 & 13.
Waiting to hear from the supplier here in Victoria.
Old books can be rather amusing where electrical content is concerned
I recall one, I think it was an original sparey "amateurs lathe" where he recommended an earth wire because it's omission made a user "jump unexpectedly" if the lathe went live and this was "quite dangerous"