Why not give Matasano a call? Rumor has it they'll give you great book(s) just for applying.
https://news.ycombinator.com/item?id=8823260
Also from Matasano: cryptopals.com and microcorruption.com
Offensive security lectures:
http://www.cs.fsu.edu/~redwood/OffensiveSecurity
Other resources:
http://www.binary-auditing.com
"Cybersecurity" is vague. What domains are you mostly interested? Crypto? Network protocols? Applications {Web, Mobile, Desktop, Client/Server}?