From
StarWars.com:
Coming next summer from DK Books,
Star Wars: Year by Year -- A Visual Chronicle tracks the history of the saga, following the production of the classic trilogy, the merchandising, the resurgence of the saga in the '90s and the prequel trilogy, as well as
The Clone Wars and beyond.
Update:
StarWars.com presents the cover art (below left) and slipcover (below right)