I'm surprised that the Michelin Red and Green books haven't been mentioned. The Red book is the bible for hotels and restaurants. The Green book provides concise histories and descriptions of major attractions.

Gualt-Millau is a bit irreverent but provides more commentary than Michelin.

Gualt-Millau in it's Paris guide points out restaurants with bargain fixed price lunches and dinners. It's a great way to sample the best restaurants of Paris at reasonable prices.