The back cover blurb for Fate of the Jedi: Ascension by Christie Golden is now online. You can see it below but beware of minor series spoilers (if you're caught up through Vortex, you don't have to worry):

In this penultimate novel in the bestselling Fate of the Jedi series, Luke Skywalker, his son Ben, and the Sith girl Vestara are in hot pursuit of the dread power called Abeloth, who has joined forces with the Sith in a bid to take over the galaxy. The leadership of the government is uncertain, torn apart by power struggles and infiltrators, while the Sith have a terrible secret that could shake the Jedi Order to its core...

Also revealed on this product page is the fact that the final three books (Conviction in May, Ascension in August, and Apocalypse next April) will feature "a distinctive look to set these final novels apart as a climactic mini-trilogy for readers."

A final note from the page: "There are more than 660,000 Fate of the Jedi series books in print." Wow!