Mortal Engines (The Hungry City Chronicles #1)

Mortal Engines (The Hungry City Chronicles #1) by Philip Reeve
In the distant future, when cities move about and consume smaller towns, a fifteen-year-old apprentice is pushed out of London by the man he most admires and must seek answers in the perilous Out-Country, aided by one girl and the memory of another. Books in this series: Book 1. Mortal engines -- Book 2. Predator's gold -- Book 3. Infernal devices -- Book 4. A Darkling plain.

Double Helix

Double Helix by Nancy Werlin
Eighteen-year-old Eli discovers a shocking secret about his life and his family while working for a Nobel Prize-winning scientist whose specialty is genetic engineering.

Feed

Feed by M. T. Anderson

In a future where most people have computer implants in their heads to control their environment, a boy meets an unusual girl who is in serious trouble.

Virtual War: The Virtual War Chronologs Series

Virtual War: The Virtual War Chronologs Series by Gloria Skurzynski
In a future world where global contamination has necessitated limited human contact, three young people with unique genetically engineered abilities are teamed up to wage a war in virtual reality. Books in this series: Book 1. The Virtual War -- Book 2. The Clones -- Book 3. The Revolt -- Book 4. The Choice.

Unwind

Unwind by Neal Shusterman
In a future world where those between the ages of thirteen and eighteen can have their lives "unwound" and their body parts harvested for use by others, three teens go to extreme lengths to uphold their beliefs--and, perhaps, save their own lives.