Eat to Live

Every writer has their own vernacular, which at times can be preachy or hard to read (the health scare tactics bother my slightly, but I get why they're there) but don't you dare let it detract from the central purpose of the book: you will not be completely healthy unless you eat lots and lots and lots of plants!
This is really just an entire book dedicated to driving home (painfully at times) a very common sense point.
If there is just one book to get started on a whole foods plant based diet this is a fantastic place to start! It's ridiculously simple in principle which makes the extremely difficult - for most people - change much less intimidating. (bonus that his recipes -especially the helpful healthy salad dressings- are super ridiculously tasty.)
If you're seriously looking to fully completely 120% no comprimises get healthy, like really truly life-changingly healthy and happy. Make sure you have a copy of this book in your whole foods library.