I highly recommend this book for getting started with offal :Amazon.com: Odd Bits: How to Cook the Rest of the Animal (9781580083348): Jennifer McLagan, Leigh Beisch: Books
But mostly I don't cook from recipes at all. I just sort of stir in a bit of this, a little of that, and a pinch of something else, stir, taste, adjust if needed.
Best pate ever (great way to work liver into your world)
2lbs liver sliced
cook in 1 stick of butter
season while cooking (I like garlic, Italian herbs, s&p)
put the whole mess into the blender (or use hand blender) adding 1 cup heavy cream
blend the living daylights out of it 'til really smooth
put in tupperware cups and chill
I sometimes add in other stuff like mushrooms, onions, capers, a splash of sherry while cooking, etc. but I have been finding that this recipe keeps getting better the more I simplify it.