The house shakes. Zoey's first thought is earthquake. Her second is unicorn-quake, and the second one turns out to be right, because something enormous has arrived and it is in a great deal of pain.
Then comes the detail everything else hangs off. The pain is getting worse every day. Not holding steady. Worse. Zoey, her mother and the cat have to find a cure before that line keeps going.
The science it actually teaches
Most books hand a child a fact. This one teaches them to read a direction.
Ask a person what is wrong with an animal in pain and you get guesses about what happened to it. Ask what has been happening to it since, and you are doing something better. A creature that got hurt and is slowly mending is one kind of trouble. A creature that is the same today as it was yesterday is another. A creature that is worse every morning than it was the night before is a third kind, and the third kind is the frightening one, because something in there is increasing.
That is why the germs are in the title. Germs are alive. They are too small to see and they multiply, and multiplying is the answer to why an untreated illness will not politely stay where it started. A broken bone does not worsen on its own overnight. An infection does, because there is more of it by morning than there was at bedtime. Your child can put those two sentences side by side at six and will still be using them at sixty.
The opening does a quieter job that is easy to read straight past. One house shakes, two explanations are available, an ordinary one and a ridiculous one, and there is nothing on hand to separate them except going outside to look. Two candidate answers and a way of choosing between them is the shape of every real question anybody has ever asked. This book does it in about two pages and does not stop to congratulate itself.
Then there is the mother, and I would not let anyone read this part as a step down. In the first book no adult supplies the answer, which is deliberate and correct. Here the store's own copy says Zoey must work with her mom. Some problems are bigger than one person, the animal is deteriorating while everybody talks, and the right move is to fetch somebody who knows more. A child who thinks asking for help is a form of losing needs to watch a capable person do it without embarrassment, and watching them do it quickly because the clock is running is the version that actually convinces.
The practical payoff turns up at your kitchen sink. After this book, washing hands stops being a rule an adult invented and becomes a mechanism your child can say back to you: they are alive, they get onto hands, hands go to faces, and there are more of them tomorrow than there are today. Mechanism beats instruction every single time, and this is the cheapest mechanism you will ever buy.
The child it lands with
The child who asks why about everything and has been fobbed off with because I said so on the germ question specifically. That happens in most houses, mine included, because germs are genuinely hard to explain to a small person and very easy to turn into a rule instead.
Then the child who worries about being ill. Naming a thing does more work than reassuring about it, and a story where the cause gets found and dealt with beats being told not to worry by an adult who is also worried.
One place to stop and talk
There is a better stopping point in this one than the obvious one.
When the unicorn is described as getting worse each day, close the book on your finger. Ask what kind of problem gets worse when nobody has touched it. Most children offer a cut that goes bad, or a cold that turns into something else, and both of those are exactly right.
Then let it sit there. Do not finish the thought for them. The whole point of the pause is that your child gets to be the one who notices something must be multiplying in there, and a seven year old who arrives at that on their own is holding something no worksheet hands out.
What to know going in
This is not the gentlest book in the series, and a parent buying several should know which is which.
An animal in sustained pain that visibly worsens over days is heavier going for a five or six year old than a baby dragon with a bad stomach. Nothing dies, nobody is injured on the page, and it does resolve. But the distress runs longer here than it does in book one, and the child who was worried about the dragon will be more worried about this one. Read it yourself before you read it aloud if your child is the tender sort.
The grade band overstates the same way it does across this series. Grades 1 to 4 on the tag, grades 1 to 3 for a child reading alone, five and up as a read-aloud. And it is book six, so Pip and the barn and the family secret are assumed rather than introduced. It makes sense cold. It is better warm.
Where to get it
$5.99 at Unicorns and Germs: Zoey and Sassafras #6. If there is a book in this series that earns its shelf space by what it does after you close it, this is the one, because the germ argument walks straight to the sink and gets used the same day. Book one is still where a new reader should start, and the rest of the series is at Stealth Science. Where to start and what to own are two different questions, and this is the book that makes the difference plain.
If your child liked this one
Books we have written about that sit close to this one, by reading level and by subject.
Caterflies and Ice: The Book Where Zoey Gets It Wrong
Caterflies and Ice: Zoey and Sassafras #4 by Asia Citro
Grade 1 to 4
Dragons and Marshmallows: The Science and the Catch
Dragons and Marshmallows: Zoey and Sassafras #1 by Asia Citro
Grade 1 to 4
Ada Twist and the Perilous Pants: Why Helium Goes Up
Ada Twist and the Perilous Pants: The Questioneers Book #2 by Andrea Beaty
Grade 1 to 4
Iggy Peck and the Mysterious Mansion: Reading a House
Iggy Peck and the Mysterious Mansion: The Questioneers Chapter Book #3 by Andrea Beaty
Grade 1 to 4
Browse every book we have written about by age, by kind of book and by subject: Find the right book for your child. Or see the whole Stealth Science shelf.
