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I bought this book because it was on sale. I am a novice gardener with a library full of the same cold weather gardening ideas - cold frames, hoop houses, sun spaces, on and on. Lots of ideas, but no one actually stating they built X and grew Y with it. I did use a row cover this year and it did extend the death of the garden by a few weeks. That is simple, standard advice, and certainly not year round gardening.
I would like to find a gardener who is specific, stating they built an 8 ft by 10 ft space that kept the temperature Z degrees warmer than the outdoor temperature, and were able to grow specific vegetables through the winter. Suggesting people use straw to insulate or animal manure inside a frame to create some heat is simply too vague to be worthy of a book. Might be worthy of a blog post...
So, if a person has never given thought to cool weather gardening, this might be of benefit. There is also a lot of general gardening information which again might help a new gardener. However, for people seeking specific information how to harvest vegetables in February, I did not find it in this book. Not surprised, but disappointed.
Note, in all the highly positive reviews, I don't see comments from people who actually grew food during the winter. They state they were inspired, gave a nice book as a gift, etc. This seems common with year round gardening books with high reviews, ratings based on feelings rather than practical application of the book.
Title is misleading... it should say How to grow your own food 365 days a year, no matter where you live ON THE NORTH AMERICAN CONTINENT. Book only deals with the North American continent and not 'no matter where you live'. Some of the ideas are indeed applicable everywhere, but all the rest is only applicable to said continent.