So it's a good thing the Yeerk let Jake eat in book 6.

[anijen21]

I think Mira meant that he wasn't trying very hard. Upon this reread, I was actually kind of struck with the fact that Jake was sort of like "...oh. Well, I sure hope my friends figure it out. This is sort of strange. Hmm. I can't move my arms. Hmm."

[Chad32]

I don't know. I guess it is true that he just kind of sat in his own heads, hoping to be rescued. Like a damsel in distress or something. This may qualify as an out of character moment.

[Mira]

I do remember thins quote. But it's true, I don't think he tried very hard, he could at least have tried to warn Rachel, that would have satisfied me, and that (I think) was a such moment when it could have worked. And maybe tell them to listed to Ax but that is less important to me

[Chad32]

Yeah, that point where he thought Rachel was asleep, and maybe Temrash would have killed her. That would have been a good place to have a break through.

[Bassline]

I think Yeerks are more ambitious and selfish than humans are and generally won't do anything unless they can benefit from it. Yeerks are parasites and rely on hosts, and it is unlikely that a parasite would evolve to deliberately kill its host. Which is probably why the Yeerk did not try to kill Rachel or any of the others because he wanted 5 morph capable hosts to bring back.