Hacker News implicitly asked him, by having a comment box and a community that generally rewards good comments about linked articles with karma and accolades. I

Hacker News implicitly asked him, by having a comment box and a community that generally rewards good comments about linked articles with karma and accolades. If you don't want to change your book based on one person's feedback, that's your right. But edw519's request was reasonable. I found his request more rhetorical than an actual request of you, anyway.