Ugh ugh ugh, I just finished #39, and I want some brain-bleach and a blowtorch. UNCLEAN! UNCLEAN!
Honestly, how out of character was their plan? There's a helicopter that needs to be destroyed. We can't go inside it, because there might be Taxxons and Hork-Bajir in there! And they're dangerous! So, instead, LET'S DROP A WHALE ON IT!!! I mean, what could possibly go wrong? Not only do helicopters, in fact, move, as was seen in the book, but they have these little blades on top that might possibly tend to hurt when you land on them. Just maybe.
The Animorphs have come up with some pretty hare-brained schemes in their time, but that one took the cake for sheer "What were you thinking?!" ridiculousity.
I was bothered by #37, too. Yes, yes, we get it, Rachel is reckless. But the key point, which they totally missed, is that she is only reckless with her own life. She would never flagrantly risk the other Animorphs' lives the way she did in that book. That made me mad, when she wouldn't even listen to Marco trying to tell her "Hey, yanno, we could all die. Just sayin'." The Rachel from the rest of the books would have listened to him.
I didn't have a problem with the first helmacron book, actually. At that point, they were even kinda cute, in a totally lunatic kind of way. Sure, they seemed to be there mostly for comic relief, but they were still an interesting race.
The second helmacron book (which I'm re-reading now) always struck me as being too contrived. Like they were just looking for a way to get the Animorphs to go inside the human body, and the whole plot was basically just an excuse to stage a Magic School Bus field trip. Nothing against Magic School Bus. But it, and Animorphs, were never meant to mix.