EvilZone

I'm interested in vulnerability research and I want to get started in reading the book mentioned in the title. But the thing is that while I'm fairly confident in Python and PHP, I absolutely have no knowledge in low level programming in any low level languages. I was told that I need to have solid knowledge of assembly and C before even saying 'I'm starting learning reversing today'.
Speaking of that, what knowledge in programming or in computer science do I need before starting learning with the book?
Thanks!