John Root is a man of many interests. His first visit to the library was in 2009, when he talked about crop circles and shared some stunning photographs. In 2010, he returned with a portable keyboard and the audience sang along to music of the Gaslight Era. On Wednesday, April 24, at 7 pm, he'll be back once again for Edible Perennial Gardening and Landscaping. His slide show will illustrate how you can grow more than the usual annual crops in your yard. Topics will include organic cultivation of fruit trees, berries, nuts, and other edible perennials. Handouts will have sources for plants suited for New England, and there may be some plants for sale for cash or personal check.