Best Books For A Beginner With Aspirations?

[Edukashun]

So I've really been putting some thought into my game over the last month.
I've been playing at NL10 after a spate of terrible play at NL25. I wasn't even rolled for NL10 so that didn't help but in honesty it wouldnt have mattered, I was playing losing poker.
After some serious hand reviewing I dropped to NL10 with a $50 BR and gave it my best shot. The way I'm going once I reach 10K hands I'll be rolled to take a shot again but I want to really up my game first.

Can you recommend some goods books?

I think Theory Of Poker is a must and the same for PNL, I also want to work on my SnG/MTT game.
I was planning on spending £100 (~$200), which others have really helped you?