My little brother has decided that he doesn't want to hold onto these anymore, and let me have them.  I don't have all 18 in the series, I am missing 3, but here is the list:

1. The Vanishings
2. Second Chance
3. Through the Flames
4. Facing the Future
5. Nicolae High
6.            The Underground- don't have
7. Busted!
8. Death Strike
9. The Search
10. On the run
11. Into the Storm
12. Earthquake!
13. The Showdown
14. Judgment Day
15.          Battling the Commander- don't have
16.          Fire from Heaven- don't have
17. Terror in the Stadium
18. Darkening Skies

If you're interested, PM me, and let's see what kind of deal we can make!