Here's a fifth Christmas book suggestion: John Agard's Alternative Anthem, his 2009 volume of selected poems.
Of if you want a collection rather than a selection of Agard's poems, I also recently read his wonderful sequence Clever Backbone, which spins out variations on the evolution of Homo sapiens going back to the African savannah several million years ago. It's 60 14-line poems that are sometimes very close to being sonnets and sometimes a bit farther.
Or if you prefer a more recent collection, there's Travel Light, Travel Dark from 2013, another excellent collection of Agard's brilliant poetry.
(And of course this wouldn't be one of my recommendations if I didn't mention that there's also my book of poems.)