The Crooked Staircase - Dean Koontz

The Crooked Staircase is the third novel in the Jane Hawk series.

Jane is still fighting the Techno Arcadians. Jane's latest target is in her sights, but she's also in theirs. While she's avoided the search teams so far they're closing in. Worse, they're closing in on her few allies. Worse still, they're closing in on her son. Can Jane get there in time? Very highly recommended.