http://www.initialvectorhunt.com/
I found this and decided to try it. You are supposed to find the codes and enter them. Each time you enter you have a chance to win the book signed by the author.
I couldnt find all of the codes but here is a list of the ones I found. I entered two times with all those codes and didnt win
1. hypercorp
2. Paris, France
3. CORPSEC
4.
5.
6. London, England
7. Vancouver, BC
8. Tranq-7
9. Dragonfly II
10. AirFlow.Net Excerpt Unlocked (Didnt watch it, but this doesnt count as a chance to win)
11. pharmaDyne
12. MagSec
13. Wye Valley, Wales
14.
15. CI strike team
16. Solomon Islands
17. dataDyne
18. Core-Mantis
19.
20. IFF chip
21. Carrington Institute
22. Zurich, Switzerland
23. DeathMatch VR
24. Hovoro Facility
25. Omni-Global
26.
27. Fairchild DW-P5
28.
29. R-C/Bowman
30.
Good Luck