PRaying for Sleep - Jeffery Deaver

From the New York Times bestselling author of The Never Game and the Lincoln Rhyme novels comes a twisty psychological thriller packed into a terrifying 24 hours...
When paranoid schizophrenic killer Michael Hrubek escapes from an institution, there's no doubt of where he's headed: to find the woman who put him away and to finally get his revenge.
Lis Atcheson knows he's out there—the man who killed two of her students. He's haunted every sleepless night ever since she testified against him. Now the nightmares are coming true. He's watching... and waiting... and he's going to take Lis to hell with him.
With a massive storm coming—in more ways than one—Lis can barely prepare for the dark cloud that approaches, threatening to take everything away from her in one horrifying sweep...