What's for Dinner?

I was in a charity shop yesterday and I overheard the staff talking about catching and eating sea-food on a holiday one of them had taken recently:

'...so he was out the front of the cottage, gutting the fish...'

'Oh no! I could never kill anything, me!'

'No, no, me neither - well, of course, I'd step on a spider!'

'Well, me too, yes.'

Just then I noticed an unusual book on the shelf in front of me.