I recommend you check out Jeremy Silman's website around the 5th of each month when he publishes a new batch of material. Today there is a nice review of theory in the English opening with 1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.d4 from the Black perspective appended to an answer to a reader's question related to this line (see "How Computers Effect [sic] Opening Theory" or "An Old Line in the English Opening"--he often cannot decide upon titles). You might supplement that with notes on our Reversed Dragon theme tournament, Georgi Orlov's "The English Opening 1.c4 e5," Gary Lane's "The English in Exile," Mjae's L'ouverture Anglaise, and a series of articles by Jeff Otto at IECG (especially Part One and Part Two).
Silman's site is full of treasures for any willing to take the time to poke around in his archive. Among my favorite pieces have been those by Joel Benjamin on the Tango and Anti-Sicilians (often mentioned here), a free Chigorin Defense e-Book by Dr. Manuel Gerardo Monasterio, Larry Christiansen's "How to Attack" series, Georgi Orlov's articles on the Middlegame and Endgame, a great collection of articles on opening theory, an incredible collection of book reviews, and too much other good stuff to mention -- all by noted players and authors.