If you enjoy reading haiku then you should really own a volume of the work of Basho.
If you enjoy writing haiku then The Haiku Handbook is essential reading.
It is a wonderful, unpretentious and enjoyable read offering remarkable insight into the form.
It also contains the finest ever explanation of why people write, read and enjoy haiku:
'It is hard to tell you how I am feeling. Perhaps if I share with you the event that made me aware of these feelings, you will have similar feelings of your own.'
OK, so I accept you probably haven't got dozens of people on your Christmas list who would want this but perhaps it is something to treat yourself to with your inevitable book tokens.
The Haiku Handbook by William J. Higginson is published by Kodansha International. And as the snow has put me in a festive mood here is a quick haiku for you:
pausing in the snow
a robin, fresh from murder,
looks me in the eye