I don't think anyone has read through this, in the second edition at least — 5 of the 13 chapters are blank.
I'm currently reading through SICP, and I think I'm going to stick with it instead of reading [the existent parts of] HtDP. I like the style of writing in SICP better. That said, if you're turned off by the writing in the first chapter of HtDP, this note appears at the end of the chapter:
"Oh, and by the way, the rest of the book uses a tone that is appropriate for a serious text."
It's an update of HtDP (http://www.htdp.org/) and it's still in progress. I taught an intro (CS1) course using last year's draft (when chapters 1, 2, and 4 were all there was) and had no problems.
I'm currently reading through SICP, and I think I'm going to stick with it instead of reading [the existent parts of] HtDP. I like the style of writing in SICP better. That said, if you're turned off by the writing in the first chapter of HtDP, this note appears at the end of the chapter:
"Oh, and by the way, the rest of the book uses a tone that is appropriate for a serious text."