I try hard not to buy up-to-the-minute cookbooks, instead looking two years out for second-hand or remaindered copies. I have a list of 2008 titles to buy before the 31st of December; then on the 1st of January 2011 I'll shift my focus to 2009.
But ... well, you know, I don't have to be ashamed here, amidst my kind, to admit that sometimes I just can't wait. So I find on my shelves both Yotam Ottolenghi's Plenty and Kim Boyce's Good to the Grain: Baking with Whole-Grain Flours (w/Amy Scattergood) even though I shouldn't have bought them till 2012. What can I say? I'm weak.
I was pleased to see that those two were the finalists in food52's Golden Piglet contest for cookbook of the year. Yes, I committed a form of -- what shall I call it? -- "cookbook adultery" by purchasing them, but man oh man were they worth the sin.
(Oh, I forgot to say, I have adopted this policy only recently, in despair over my book budget. That's why you'll find lots of other 2009 and 2010 cookbooks on my bookshelf. But those two, Plenty and Good to the Grain, were bought after the policy went into effect. Supposedly.)