Julie of Research Service recommends Vegetable Literacy by Deborah Madison:
Part cookbook, part gardening guide, part botany lesson, Vegetable Literacy packs a wealth of information for the curious kitchen gardener. Deborah Madison is a veteran writer of at least a dozen vegetarian cookbooks and this latest brings all her knowledge and expertise into one beautifully-illustrated volume. Organized into 12 chapters, Madison groups vegetables according to botanical family and explains the relationships between the plants in each grouping. Each vegetable has its own section with recipes, growing tips, and recommended varieties. Madison provides a foundation for improvisation in the kitchen by sharing her botanic and culinary knowledge of vegetables so that readers will have the tools to successfully create their own unique flavor combinations.