Vegetable reference books: Where did THAT come from?

How do you grow it? How do you harvest it? How do you prepare it? Here are three references that will help you learn more about veggies like red runner beans, New Zealand spinach (one of our favorites), black radishes, purple potatoes, kohlrabi (another on our “like” list), fennel (the herb and the vegetable), and rainbow-colored carrots.
Read more: Vegetable reference books: Where did THAT come from?