Moving target
(Book - Large Print)

"When Maddy McKay and Quinn Holcombe don't show up for Quinn's surprise birthday party, his friends know that something is very wrong. Their search turns up little beyond evidence that Quinn and Maddy just decided to take off for a long overdue vacation. But it soon becomes apparent that they did not leave of their own accord. Maddy awakens in a cement room with no idea where she is. But it's not long before she realizes she's in the clutches of a madman exacting revenge by hunting. His prey of choice? Humans. Now Maddy and Quinn must run for their lives, hoping to find their killer before the next game begins. Because if they don't win this game, they die."--Amazon.com