Fatal Error is the next to last novel in the Repairman Jack series. You have to have read the previous novels or you will be totally lost. They're well worth reading. Repairman Jack is one of my favorite characters and series.
Jack has several irons in the fire. He's trying his best to keep up with the plots the Otherness has going and keep everyone safe, especially Gia and Vicky. Dawn has her baby and it's a surprise, and the lady is fading fast. Of course since this is the next to last book in the series there's a cliff hanger. Very highly recommended.