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I cruised through most of it. But the last three chapters really twisted my brain (continuations, the Y combinator, and the metacircular interpreter). I was familiar with the concepts, but figuring out the programs by myself was a tough exercise (I haven't read SICP though).

> If you're going to read it on a screen, I recommend this version: http://sarabander.github.io/sicp/

Thank you very much for the link! :)

Opening it on my phone, this paragraph on the available ebook formats very much made my day:

> A 386 can, in theory, run Linux, Emacs, and a Scheme interpreter simultaneously, but most 386s probably can’t also run both Netscape and the necessary X Window System without prematurely introducing budding young underfunded hackers to the concept of thrashing.

Trust me, it will :) The last few chapters on CPS and the Y combinator are roughly a vertical segment on an otherwise nearly horizontal learning curve.