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The Hidden

(Animorphs #39)

3.66  ·  Rating details ·  1,888 ratings  ·  69 reviews
The Yeerks plan to use the Helmacron ship they have repaired to capture the Andalites and track down Elfangor's blue cube--the cube that gives Cassie, and the other animorphs the ability to morph. ...more
Paperback, 121 pages
Published March 2000 by Scholastic Paperbacks
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Average rating 3.66  · 
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 ·  1,888 ratings  ·  69 reviews

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Kara Babcock
Cassie is the Animorph who will kill you kindly, with her apologies.

Rachel, of course, would just flat-out murderize you with her polar bear or grizzly bear or elephant morph, and you would be Dead. Jake would kill you because it was necessary, not because he particularly enjoys it. Marco would make lame jokes about death, then find a way to engineer your death.

Slowly but surely, all the Animorphs are getting far too acquainted with murder and death for their own liking. But I feel like it takes
Ghostwriter: Laura Battyanyi-Weiss. And thank goodness for her, because somehow she's been able to write Rachel, Jake, and now Cassie pitch-perfectly -- she's fantastic, I'm bummed to see that she doesn't write any more after this point!

A nice little summary of Animorphs in general and #38 in specific: I almost started crying on the subway while reading about a buffalo, then cackled over Ax's jokes and the group's wonderful banter, and then despite the entire series fitting this category, I've n
Aug 24, 2015 rated it really liked it
There are not enough drugs for the reading of this book.

This is something that could only have come this late in the series when they've built a loyal fan base who could follow what was going on and handle being SO DAMN CREEPED OUT by it. Because man, there is nothing quite so creepy as ant-Cassie, for realz.

I like that this takes a break from the Yeerks (sort of; that plotline gets relegated to a sub-track) to look at the morphing technology itself and how it can go so, so wrong. I do agree wit
Jun 18, 2014 rated it liked it
Cape buffalo are awesome. That's what I got out of this book. Cassie got to let out a little rage as the buffalo, and I think she needed the outlet. ...more
Nemo (The Moonlight Library)
Brought to you by The Moonlight Library!

When the Yeerks find the Helmacron ship and learn how to pinpoint the morphing technology to go after the Escafil device/blue box, Cassie and the Animorphs have to play a dangerous game of keep-away.

To put it politely, this is one of the worst Animorphs books, if not the worst book, in the series. And that’s saying a lot because the Helmacrons don’t even show up in this novel, although they are an important plot point. I hate the Helmacrons, but who wouldn
Mar 23, 2018 rated it it was ok
Shelves: owned-and-read
Why even was this? New level of weird.
   Let’s ignore one little tiny fact in order to talk about this book:
   In this book, an animal has only to touch the blue box in order to gain the morphing ability.Any other time the blue box was used to give someone the morphing ability, an Andalite had his hand on one side of it and the human had his/her hand on another side. Plus when David handled the blue box, he was not suddenly able to morph. It was only once Ax held it and David touched it that he obtained the power to morph (so far as
The Library Ladies
(originally reviewed at )

Narrator: Cassie

Plot: I had zero memory of this book when I picked it up again. I think if you had asked me whether there was an Animorphs cover with Cassie morphing a buffalo, I wouldn’t have been entirely sure you were even serious. That’s how fully I’d forgotten this book.

Erek shows up at Cassie’s barn with bad news: the Yeerks have discovered how to use the Helmacrons’ morphing tracker and are even now on their way towards the blue box that em
Jonathan Pongratz
Sep 05, 2020 rated it it was amazing
Shelves: ya, science-fiction
Original Review at Jaunts & Haunts


Yes, another great Animorphs book!

I gave this one four and a half stars.

I'm really happy this one turned out well. When the blurb referenced the Helmacrons I couldn't stop my eyes from rolling. They are literally the worst alien species in this universe. However, I was delightfully surprised with this read.

This time around we are in Cassie's POV, and once again we are given a thought-provoking journey.

This is one of the shortest Animorphs books and things k
Kate Crabtree
Nov 30, 2020 rated it it was ok
This is one weird book that feels like a filler to me. The Animorphs must stop a helicopter that is tracking the blue cube and morphing energy. A Buffalo accidentally touches the cube and then touches Chapman and Visser Three and somehow squires them (how? The Animorphs have to think about the animal they’re touching to acquire it- does the Buffalo have this ability?) and then later on an ant somehow develops the ability to morph and acquires Cassie and there’s nothing more creepy than seeing a ...more
I'm of mixed minds. The morph-capable animals morph too easily and the buffalo learns too quick, but hardly the least feasible thing the series has come up with and it's more than worth it. The concepts here are bizarre, thorny, and extra horrifying--again, even for the Animorphs series! It's a natural fit to a Cassie PoV, and she's appropriately ambivalent. But the pacing, length, and ending are a little weak (the strain of making dozens of rapid morphs is particularly poorly handled), so this ...more
Jul 21, 2018 rated it really liked it
3.5 rounded to 4/5

Not sure why so many people hated this! I loved the WEIRD aspect!


I've often wondered

ONE ISSUE I had was that morphing REQUIRES concentration on the act. Without sentience, I can't really see this happening. The rest of this book was pretty interesting, so I'm going to let this big flaw SLIDE.

What I LIKED about this, in spite of the aforementioned massive flaw, was the fucked up mutant chapman African cape bull. The fact that the bull seems to almost talk was pretty fu
David Cox
Every now and then the ghost writers have really good bits of prose in otherwise pretty standard text. It's easy to read with a dash of "oh that's a good moment. That stands out." This had some really moving moments in it. It's also one of the more tragic and traumatic of the series because of the very complex moral dilemma that faces Cassie. No spoilers but damn! This one is another of those "and now the main character has trauma that'll stay with them forever" books in this series. Definitely ...more
Alright, I know I should have read the previous book (book 38) because that book tells us the Andalites have finally arrived on planet earth. I already have that ebook ready and I will make sure to come back to that soon.

Alright, so the book begin with Erek urgently informing Cassie that the Yeerks have managed to fix the Helmacron ship, (yep the very annoying lil cocky alien's ship). If you remember those alien have morph-seeking capabilities and now the Yeerks are using it to track down the A
Jul 16, 2015 rated it it was ok
This review has been hidden because it contains spoilers. To view it, click here.
Jenny Clark
Jun 17, 2017 rated it really liked it
Shelves: animorphs, childrens
This review has been hidden because it contains spoilers. To view it, click here.
Mar 07, 2012 rated it it was ok
Shelves: animorphs
Really, this book should probably be struck out of the canon. The absurdity of animals gaining the ability to morph from merely touching the morphing cube is too much, even for me. Plus, there is no insight into any of the characters, no growth, no interesting conflicts -- nothing. Cassie almost jumps the shark by being hesitant to kill an animal that merely has human DNA in its bloodstream. Yeah. Insane.

Not worth reading.
Aug 29, 2008 rated it really liked it
Tiny virus-sized aliens ATTACK! Their megalomaniacal nature is amusing, but it kinda gets tiresome after a while.

Notable moments and inconsistencies:

This book is ghostwritten by Laura Battyanyi-Weiss. Her name's misspelled in the credits page.

It makes no sense that an animal like a buffalo could "accidentally" morph since it's been said many times that both acquiring and morphing take concentration and intent. How could a buffalo do it randomly?
Dec 01, 2018 added it
What. the. ever. loving. hell.
Jul 02, 2016 rated it really liked it
As usual, this series delivers.
Mar 29, 2020 rated it really liked it
This review has been hidden because it contains spoilers. To view it, click here.
Aug 05, 2019 rated it it was ok
Disclaimer: I'm reading this series for the first time as an adult. (Unfortunately) I have no fond memories coloring my reading.

The most I can say about this one is that it wasn't the worst book of the series. I guess it wasn't even bad? While it explored a new idea, it didn't really work for me well. The idea really should have surprised me, but it didn't at all. (Maybe how it was handled by the author?)

If you read enough werewolf stories, eventually you'll get to ones in reverse: What if a wer
Books That Burn
The Animorphs are on the run from the Yeerks' morphing sensor. This book turns a slightly silly premise into a visceral horror and complex ethical dilemma when a bison accidentally gains the morphing technology. The usually body horror cws apply.

They're all dark, but now we have a new, more complex flavor. This also offers up the very worrisome implication that if any creature touches the cube they might become able to morph. They'll have to keep it very well sealed, for even more reasons now.

Aug 17, 2020 rated it it was amazing
Five stars for how BIZARRE this one is. A water buffalo (and later, an ant) get the morphing power and an ethical dilemma ensues for Cassie. I like when they play so much with the morphing technology, but you have to make a certain allowances in this one and later in the series with how easy it is to get the morphing ability just by touching the blue cube. Also, can't Ax find any better way to dismantle it or hide it so that the Yeerks can't track it? Cassie!Ant was also appropriately horrifying ...more
Chelsea Gouin
Nov 14, 2019 rated it liked it
Shelves: animorphs
Meh. I've never been a big fan of Cassie's books. This one is along the same lines of a morality crisis. This time she accidentally grants a buffalo morphing powers and doesn't want to put it down even though it's suffering and a total risk to them for exposure. And the Yerks were using the Helmacron technology to track morphing power. I hate the Helmacrons. :/ On to the next, but this was another bummer one. ...more
T Berry
Oct 20, 2017 rated it it was ok
This was....a very messed up book. Which is saying a lot considering it's an Animorphs book.
Having said that I seem to recall having a stronger reaction to it when I first read it than I did on this reread. But I guess that's pretty normal. It definitely gets weird. And disturbing.
Su Vida
Nov 27, 2016 rated it it was amazing
Amazing as usual! Though I do not get the speciesism displayed here (e.g. Casual discussion about the murder of a buffalo and then concern expressed only because it may have human DNA in his blood-stream).
Jan 07, 2021 rated it it was ok
The premise of this could have made for a much better book. It's too bad. The writing style of this book was far too simplistic while also having very descriptive, brutal violence... It's like a 13 year old boy wrote it. ...more
Aug 09, 2020 rated it it was amazing
Mmmmm. This one’s wrong too: Don’t talk tough when you can’t see the hole in one big steak that I cooked for your dad. Cassie has the kahunas of a cape buffalo when she jumps to the other side of life.
Joshua Glasgow
Mar 25, 2020 rated it really liked it
I’m sort of a sucker for Cassie books. Everything with the buffalo is weird and wonderful. There are a lot of Animorphs books that run together. I’ll look at the cover and not be able to recall what a specific one was about. I can’t imagine having that problem with this one. It will stick with me.
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also published under the name Katherine Applegate ...more

Other books in the series

Animorphs (1 - 10 of 54 books)
  • The Invasion (Animorphs, #1)
  • The Visitor (Animorphs, #2)
  • The Encounter (Animorphs, #3)
  • The Message (Animorphs, #4)
  • The Predator (Animorphs, #5)
  • The Capture (Animorphs, #6)
  • The Stranger (Animorphs, #7)
  • The Alien (Animorphs, #8)
  • The Secret (Animorphs, #9)
  • The Android (Animorphs, #10)

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