Who staged the bomb threat at Hunta's hotel? (p. 386)
Some nut.

Some nut in the media perhaps?
Scott throws the possibility out there, but we just don't know. By "we," I mean me.

Why would Harmony ask Scott if he's in love with her if all she can smell on him is "strategy"?
I'm wagering the question was part of her own strategy to throw him off guard.

Had Harmony agreed to film an hour-long confession/interview, as Scott proposed, do you think it would have been enough to save her public image?
I think the media would have gone relatively easy on her, mostly out of political correctness. But despite Scott's assurances, the lie would have followed Harmony for the rest of her life and beyond.

Scott is right, however, when he tells her that confessing is much, much better than being caught. Had Harmony been unwillingly exposed as a fraud, the chattering class would have fried her like a ham steak.

Does Harmony really have a fantasy about traveling the world with Scott as publicist-and-wife (page 390)?
Yes, but as Scott suspects, most of that fantasy revolves around her being "the world's most famous woman," loved and respected by all. Scott's just window dressing.

So if Scott had agreed to betray Hunta and stay at Harmony's side, as she proposed, do you think they could have been happy together? Could he have truly given her endless fame?
Doubtful. Even if Maxina and the others had never found a way to stop them, Scott would have eventually run out of tricks to keep Harmony in the news. And when Harmony's celebrity status dried up, their relationship would probably dry up soon after. As sad as it sounds, any genuine feelings Scott and Harmony may have had for each other were forever tangled up in her fame.

Why does everyone at Mean World blame Scott for what Simba did?
Scott is the front man and the fall guy for the entire Harmony Prince campaign, and for very good reason. It was all his plan, and that plan is obviously not going well at the moment.

Plus, there are still those dangerous rumors that Scott has a "thing" for Harmony, and that he'd rather see Hunta and Mean World go down in flames than ruin Harmony's sweetheart status. That's enough to cause serious tension between Scott and his stressed-out clients.

And yet Scott is annoyingly defiant to the Judge and the others. Is that really wise?
Not a bit.

Okay, so the sticky note on Scott's car–
–was left by Miranda, who by now is pretty confident that she's got Scott by the short hairs.

On page 402, Scott tells Harmony that if the insurance tape is leaked, Harmony would be implicated and Scott wouldn't, because her voice is in the public domain and his isn't. Is that true?
Nah. Scott quickly admits (to the reader, at least) that most of his threat was bullshit. But he does a good job making it sound convincing to Harmony, and that's all that matters.

In their phone call, Maxina promises Scott that she'll do everything in her power to save Harmony. Does she mean it? Is it even possible?
Maxina definitely means it, but whether she can pull it off is a whole separate issue. At the very best, Maxina would have gotten Harmony safely out of the spotlight without too many bad things being said about her. But from there Harmony would be persona non grata for the rest of her life, although I'm sure she'd be picked as alternate to fight Tonya Harding in Fox's Celebrity Boxing.

Why does it take Scott so long to figure out that Miranda's hot on his trail? He's the one who originally tipped her off!
Yes, but he's too distracted by current events to really put two and two together. And last he knew, Miranda was on the other side of the country, throwing flatware at her husband.