Read a book.
Hatch a friend.

BookBrood is a reading pet for your phone. Read any book, paper or e-book, and the little creature that hatches grows a personality out of what you read.

No spam. One email when your egg is ready to hatch. Privacy

1,000+ downloads of Silverfish, the reading pet already
living on e-readers. Same maker, same creature.

Every reader
has a pile

The book on the nightstand since March. The one you swore you’d finish. Books are easier to finish when someone is waiting for the next page.

Your pet knows what you’re reading

Tell it your book, and it talks about the book’s people and places while you read.

The pet’s room in the app, reading The Great Gatsby
The pet’s room in the app, reading The Red and the Black
The pet’s room in the app, reading Don Quixote

Gatsby keeps staring at a green light. I know that look.

And it changes with what you read

Read three gothic novels and it gets a little dramatic. Every book leaves a mark, so no two silverfish are alike.

Romantic
Highbrow
Jumpy
Obsessed with family

Five eggs. One awake at a time.

Each creature has its own story and its own way of reading with you. When you want a change, the one awake goes to sleep. Nobody gets left behind.

The Silverfish

Lives between the pages of old books and eats them. Dry, a little cynical, and full of opinions about everything you read.

IT SAYS“I ate well. I’ll be kind for about fifteen minutes.”

The Ash Cat

Comes from cats who pulled pages out of the ashes and learned them by heart. Watchful, loyal, a little paranoid. Keeps your pages instead of eating them.

IT SAYS“I watch the door, you turn the page. Deal?”
A spotted egg with a small crack

More are on the way

Three eggs are still warming up. Each one has its own story, its own room and its own opinions about your books. They’ll hatch later, one at a time.

Save an egg

Silverfish is free on KOReader today

Silverfish is the e-reader version, and where all of this started. It lives inside KOReader and reads the pages with you, on Kindle, Kobo, Boox and more. Later, you’ll be able to bring it along to the app.

Get Silverfish Free and open source on GitHub

Questions before the egg hatches?

Still have a question?

The Silverfish readers hang out on our Discord, and so do we. Ask anything.

Ask on Discord
When does it come out?

There’s no date yet. Join the waitlist and you’ll hear first, and you can help test it before anyone else.

Does it work with any book?

Yes. Read e-books (EPUB) right in the app, in its own reader, or bring a paper book: add it by title or by scanning the barcode.

Will it spoil my book?

Never. It only talks about pages you’ve already read.

iPhone or Android?

We’re starting with iPhone. If you’re on Android, pick it on the form: it tells us how soon to build it.

What happens if I stop reading?

Nothing bad. It falls asleep in its room and wakes up when you open a book again.

Can I have more than one creature?

Yes. The Silverfish and the Ash Cat come first, and three more eggs hatch later. One is awake at a time, and switching puts the other one to sleep. Nobody gets left behind.

I already use Silverfish. What happens to it?

Nothing changes. The plugin stays free and keeps getting updates.

Someone’s waiting in this egg

Leave your email and we’ll tell you when it’s ready to hatch.

No spam. One email when your egg is ready to hatch. Privacy