Hi, yes there are quite a few, if you type, shop.rhsshop.co.uk/shop/Greenhouse/Books into google, then click on the above address, you will get some good informative books, Derek.

Before you buy a book have a look at the video on https://www.youtube.com/watch?v=Jtw7pnqFeS4 It talks about the way to grow in an unheated greenhouse as well as explaining about suitable crops and maintaining them through the winter. It is American but is a very sensible article.