Star Trek: Prey is an upcoming trilogy of novels by John Jackson Miller, to be published from September to November 2016, to celebrate the 50th anniversary of Star Trek. The three novels are Hell's Heart, The Jackal's Trick and The Hall of Heroes. The covers of each volume are by Doug Drexler.  The author has tweeted that there are major roles for James T. Kirk, Spock, Picard, Worf and Riker. 
Hell's Heart Edit
When Klingon commander Kruge died in combat against James T. Kirk on the Genesis planet back in 2285, he left behind a powerful house in disarray—and a series of ticking time bombs: the Phantom Wing, a secret squadron of advanced Birds-of-Prey; a cabal of loyal officers intent on securing his heritage; and young Korgh, his thwarted would-be heir, willing to wait a Klingon lifetime to enact his vengeance.
Now, one hundred years later, while on a diplomatic mission for the United Federation of Planets, Captain Jean-Luc Picard and the crew of the USS Enterprise are snared in the aged Korgh’s trap—and thrust directly in the middle of an ancient conflict. But as Commander Worf soon learns, Korgh may be after far bigger game than anyone imagines, confronting the Federation-Klingon alliance with a crisis unlike any it has ever seen!
The Jackal's Trick Edit
The Klingon-Federation alliance is in peril as never before. Lord Korgh has seized control of the House of Kruge, executing a plot one hundred years in the making. The Klingon cult known as the Unsung rampages across the stars, striking from the shadows in their cloaked Birds-of-Prey. And the mysterious figure known as Buxtus Cross launches a scheme that will transform the Klingon Empire forever.
Into danger flies Admiral William T. Riker and the USS Titan, charged with protecting the peace forged nearly a century before during the Khitomer Accords. Aided by Captain Jean-Luc Picard and the USS Enterprise, Riker and his officers scour the stars, seeking to find the Unsung and uncover the truth behind the conspiracy before time runs out.
Yet even as Commander Worf departs on a deeply personal mission of honor, hidden sinister forces seek to turn the crisis to their advantage. And the conspirators’ plans threaten to spiral out of control, jeopardizing the very empire they aspire to rule.
The Hall of Heroes Edit
The Klingon Empire stands on the precipice. In the wake of violence from the cult known as the Unsung, paranoia threatens to break Chancellor Martok’s regime. Klingons increasingly call for a stronger hand to take control...one that Lord Korgh, master manipulator, is only too willing to offer.
But other forces are now in motion. Assisted by a wily agent, the Empire’s enemies secretly conspire to take full advantage of the situation. Aboard the USS Titan, Admiral William T. Riker realizes far more than the Federation’s alliance with the Klingons is in danger. With the Empire a wounded animal, it could either become an attacker—or a target.
Yet even as hostilities increase, Commander Worf returns to the USS Enterprise and Captain Jean-Luc Picard with a daring plan of his own. The preservation of both the Empire and the Federation alliance may hinge on an improbable savior leading a most unlikely force....
- Star Trek: Prey article at Memory Alpha, the wiki for canon Star Trek.
- Article with each novel's blurbs at Trekcollective.