I've been thinking about this while waiting (not so) patiently for the 75,000 new books to be added to EYB. Although we all have different ideas about it and different health issues, most of us probably like to think we eat healthily. I certainly have a lot of cookery books purchased in the hope of achieving this worthy ambition, many of which are little used. My main problem is that fat tastes so good dammit.
Ainsley Harriott's "Low fat meals in minutes" is the "healthy" book festooned with the most favourite recipe post-it notes on my shelves (flagged RI in EYB) However, a local discovery is "Eat well live well with high cholesterol" by Karen Kingham (nutritionist) Murdoch Books, Australia (2007) ISBN 9781740459792 (yet to appear on EYB) What I like about it is that it doesn't just have yummy savoury dishes, but also has various low fat cakes which are surprisingly good.
There are probably lots of books out there that I should hear about though.