Don't bother with the books - they are all awful. Get Nigellas 'How to be a domestic godess' and a packet of Doves Farm GF Self raising flour. You can just subsitute with that straight in. I like the cherry chocolate cupcakes a lot..
I quite fancy making an apple cake that I have adapted from a recipe I cut out of a newspaper ages ago. It is made with diced apples, honey, ground almonds and SR flour - I will buy some GF flour and see if it works as a replacement. And I'm quite partial to Nigella's cherry choc cupcakes too!