The Guide Hachette des vins is probably the best respected reference guide to the wines of France. Published annually and now in its 30th edition it is based on blind tastings by experts, not by accepting any payment for inclusion. It rates wines by a star system and highlights “Coups de Coeur” (favourites) and those wines which represent good value for money! It is only available in French, but includes a wealth of information on over 10,000 individual wines (owners, contact details etc) at all price levels, together with background info on the wine-making process, grape varieties, food and wine etc. As such it is an ideal guide to seeking out some of the best wines in each region of France (and Luxembourg)!
Guide Hachette des vins de France

There is also some information available on the Hachette website, including details of online access and smartphone aps etc – but all in French!