Harrap’s French-English & English-French Dictionary –> Ok… so maybe I’m kiiiind of cheating by posting this one. But seriously: this is a good read. I can get lost in here- so many great words. And in TWO languages! :D

In addition to this being on my constant reading list, and being among the best Christmas presents I have ever received (I know… easy to please right?) this dictionary has very useful “Living Language” and “World of Work” sections. These address everything from applying for jobs in French, preparing a Europeanised CV (or résumé, for you Americans out there) and all other sorts of nifty formulations and phrases for the professional world. 5 stars.