Books with author John Vornholt

The U.S.S. Enterprise™. is stunned when famed scientist Lynn Costa is murdered in one of the ship's science labs. She and her husband Emil were known as science's greatest ongoing collaboration and, together had received the Federation's highest honors for their achievements in scientific research. Determined to see the culprit brought to justice, Captain Picard assigns Lt. Worf and Counselor Deanna Troi to the case. their routine investigation of the ship's science lab soon reveals a dangerous web of deceit, betrayal, and madness. Now, Worf and Troi find themselves struggling against a ruthless assassin set on revenge -- for whom murder is only the beginning...

SORCEROR SHOWDOWN!Just when all the trials appear to be over for Rollo, the evil sorceror Stygius Rex returns, demanding that the new troll king surrender the lands of Bonespittle to him. As an incentive, Stygius produces Rollo's father and his former bridge mentor as hostages!The only way to stop Stygius is for the trolls to find a legendary treasure that was created by a troll king long ago and left with the elves in the Great Chasm for safekeeping. Now Rollo must figure out a way to make peace with the elves, find some treasure he isn't sure exists, rescue his father, and defeat Stygius, all the while hoping he can free his little fairy friend Clipper from the evil spell she's under. Will the new troll king ever make it to his coronation?