I’ve browsed several of them. 
 
I’m not a fan of Let’s Go, although they may have improved recently.  Frommers is definitely one of the best guidebooks on Greece (if not the best) with its very thorough and more up-to-date knowledge about the country.  Lonely Planet is also one of the best; it has certainly come a very long way.  Lonely Planet now also has books on specific regions (for example, Peloponnese, Corfu and Ionians, Crete, etc), as well as pocket guides and food guides.  AAA has come out with some cool books, not very thorough, but well illustrated, with suggested itineraries geared towards tourists exploring the country by car.  Eyewitness Travel is awesome (one of my favorites) with its [plentiful] illustrations, pictures, maps, and diagrams, that teach readers about the country, its architecture, art, history, nature, and so on.  Michelin is good, but focused more on listing places of accomodation, than being an educative tool.  Green Guide is okay. 

I think we used Lonely Planet.
In general, I usually prefer Rough Guide.

Thank you both

I would go for tripadviser and travelpod

Matt Barrett’s Greece Travel website is helping me ssoooooo much right now !!!
Every information a traveler needs to know about Greece is there.

Here is the link http://www.greecetra…

I used his site back in 1999 for my trip to Greece and emailed him with a few questions. He was very helpful.

I used him a bit for our 2001 trip, too.