I am new to this site. I have a heavily-wooded backyard with a very happy family of several varieties of hellebores. I want to purchase the book, Hellebores; a comprehensive guide by C.Burrell,J.Tyler. If anyone has this book, is this the best for learning about the varieties? Also, I have moved several plants to a new bed and want to add some other plants with them. What options could someone suggest besides ferns and epimediums(epimedia?)?