My hubby always said to me I was anally retentive when it came to things like this but in books it drives me nuts!!
The kids bought me a book for Christmas - Buried Alive by J.A.Kerley and there were two glaring errors in it. So I've decided to be pro-active this time and have written to HarperCollins to point out the mistakes - watch this space for a response!
Have you found any errors in a book that have really annoyed you?