Get ready to immerse yourself in the world of plants with this set of two hardcover books, Promise of Spring and Perennials. Written by various authors, these books cover a wide range of topics related to agriculture and plants. The books are perfect for those who are interested in learning more about perennial plants and their care. The set includes both Promise of Spring and Perennials, both of which are hardcover books. The books are written in English and are ideal for those who are looking for comprehensive information on perennial plants. The books are a must-have for any plant enthusiast and are perfect for adding to your collection.