This sounds like exactly the kind of book I need. We are in greenhouse planning stages. I live in Northern BC; we get really long daylight hours in summer, and very short in winter. I live "near" the coast, so the temperatures are moderated, but still can occasionally get down to -30 C in winter, and it is often overcast. I love the idea of keeping my chickens in a greenhouse in the winter-- their coop is in a forested area and we have to keep a light on to get any eggs in the winter. Considering my situation, do you think a greenhouse would even be a viable option for winter greens and electricity free eggs? I don't know anybody around here who keep greens through winter, other gardeners have said they would have to use lighting, which would be much too expensive.