Have you tried any of the websites/ calorie counting websites?
I use one, and find it much quicker and easier than a book. Plus the values for branded stuff are a bit more accurate and up to date I think, there are always generic things on them too (mostly the fruit and veg )
Or there's also Free Calorie Counter, Diet & Exercise Journal | MyFitnessPal.com which I think has an iphone app (if you happen to have one). I liked this one too, but found it a pain if what I wanted (e.g a branded item like i don't know a cereal bar) wasn't already entered or if I wanted a different serving size to the pre-set one - I just found the the other two easier to use really.
If you do a google search I'm sure there are loads more too, these are just the ones I've tried out