How to Cook on a Sunday

I would assume that you're normally off on a Sunday, am I right? Sometimes not this week. But no, I'm normally there on a Sunday because it's a big day for us. Every now and then you take a Sunday off and go for a pub lunch. Some days are for life admin, brilliant. What is your most well-read or well-thumbed cookery book? Book North by Guna in Icelandic restaurant Deal.