The sample PDF gives some good thoughts on the HN title but this submission feels overall more like an advertisement.
I'm interested why they recommend HipChat and not Campfire i.e.
Hey, co-author here.
this is indeed supposed to be an advertisement (we're not the first to do that, Sacha Greif and others have done it before) but we're also looking for feedback.
we chose hipchat instead of campfire because of the desktop app and the easier pricing.
I tried both of them, and the reason I like HipChat over Campfire is that it makes easier to manage private chats as well other group chats, both public and private.
Edit: I have nothing to do with this ebook :)
A must-read for anyone willing to start a tech company. Some insights might apply to other sectors though.