Celery. Chop it up finely and add to sauces and stews; great in bolognaise for added umami flavour.
Also carrots, cooked and blended into sauces and gravy, adds sweetness. And don’t forget carrot cake, which surprisingly does not taste of carrots, but they give it a real moistness.
The God Delusion by Richard Dawkins. This book is a good, non-nonsense dissection of the folly of religion. He has also written many books on religion too, any of which are well worth a read.