SICP (this time I'm serious)

I trolled over a year in 4chan's /prog/ and now I've been lurking here for a while. All the time I've seen references to this book, SICP, that I assumed was just trolling and I've recommend SICP to every other thread to everyone myself too ("Read SICP").

But now, I have started to wonder if this SICP would really be worth reading. I already have good understanding of programming techniques and data structures. I've been working for about two years in programming job.

So how is it /prog/. Would SICP be a good read for someone who already knows the stuff? Where should I buy it? Amazon?

>>8
Hell, I can do that right now. Show me something cool.
void * apply(void *f(void*), void *a){return f(a);}

I jest, I jest.