Came upon this book over the weekend and feel i can thoroughly rrecommend it. It seems to be a mine of information, (to me anyway)
The Jams Preserves and Chutney handbook by Marguerite Patten. Its a softback book. Its listed as £7.99 sterling and tells you all you need to know to preserve your harvest of fruit,and veg.

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And when you're back stops aching,
And you're hands begin to harden.
You will find yourself a partner,
In the glory of the garden.

Rudyard Kipling.