A new book out this week celebrates trees and the arboretum at Ottawa's Central Experimental Farm. It's a reference book for common trees of the North East, and a walking guide for the arboretum. Proceeds will support continuing efforts by the Friends of the Farm to protect and enhance the historic outdoor space. Photos from the book are featured in the farm's October art show. Ottawa correspondent Lucy Martin spoke with the co-authors of For the Love of Trees at the edge of the arboretum.