In reply to purplemonkeyelephant:
> Whilst I have no idea if it was Ghostwritten, I remember reading Ranulph Fiennes 'Cold' and whilst a good read there were a fair few errors.
I know that Fiennes does not do all his own research, sending others to do it, so him doing it for the writing also would not be a stretch, given his style of doing things.
A colleague of mine helped out Messner with some stuff years ago (1990?) and RM introduced to my friend another guy whom he called 'my ghost writer' (and not in a joking way).
Barry Blanchard's recent BT winner, The Calling, had - at least in my edition - an appalling number of typos and misspellings. I lost count after a while and it did spoil it for me. Luckily Barry has such a good story and is generally a good writer that it's still worth it.
The other thing about that book, and others, is that some of the chapters are quite different pieces, written at quite varying times, edited by various people, then all combined at the end. This can introduce the type of repetitions and inconsistencies noted above, though of course, like the typos, a good copy editor / editor should pick those up.
Some really do go beyond the acceptable. 'On Top of the World: The New Millennium', the 2012 update to Sale and Cleare's excellent 1999 'On Top Of The World', chronicling all the 8000ers, has the photo topos wildly wrong, with completely wrong mountain faces shown, with lines seemingly made up. Unbelievably sloppy and makes you wonder what else is wrong in the book that you don't know about.