It's quite annoying to see entire books submitted. It should be a requirement that you must be able to thoroughly discuss a submission. You can't discuss the entire contents of a lengthy text in a HN thread. It's like submitting a Google search or an index to pg's essays.[1] The discussion is always superficial.
If you were really interested in SICP, then you probably would have already found this link. It's the 2nd result on Google for "SICP". A blog post on the merits of SICP would be more useful.