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My Sister The Werebeast

by Alina Tysoe

The Addams Family meets The Incredibles in this hilarious story about a little kid with supernatural powers and the sisters who watch over her, from the creator of What's Up Beanie!
Something strange is happening to Peanut--and her sisters are doing everything they can to keep it under control.

Mira and Rosie are determined to prove they've got everything handled. Between preparing for their school's upcoming combat trials and taking care of their adorable baby sister, they are absolutely, definitely in control of the situation. Probably.

There's just one small problem: Peanut is not an ordinary baby.

She cries so hard she floods the house. She occasionally breathes fire. And sometimes she transforms into a very soft--but very intimidating--creature with powers they can't explain and definitely can't expose.
So Mira and Rosie do what any responsible older siblings would do: they hide Peanut's abilities, clean up the chaos, and insist everything will be fine until their parents return. Easy, right?

But things quickly spiral when rumors of a dangerous werebeast spread through town and a mysterious monster hunter arrives looking for answers. Now the sisters must juggle training, secrecy, sibling chaos, and a growing supernatural mystery that threatens to expose everything.

Perfect for readers who love:

- laugh-out-loud sibling dynamics
- magical creatures and hidden powers
- monster mysteries with heart

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Pages:

320

Published:

Jan 2026

Format

Paperback

Publisher

Roaring Brook Press

Imprint

First Second Books

ISBN:

9781250896681

The Addams Family meets The Incredibles in this hilarious story about a little kid with supernatural powers and the sisters who watch over her, from the creator of What's Up Beanie!

Something strange is happening to Peanut--and her sisters are doing everything they can to keep it under control.

Mira and Rosie are determined to prove they've got everything handled. Between preparing for their school's upcoming combat trials and taking care of their adorable baby sister, they are absolutely, definitely in control of the situation. Probably.

There's just one small problem: Peanut is not an ordinary baby.

She cries so hard she floods the house. She occasionally breathes fire. And sometimes she transforms into a very soft--but very intimidating--creature with powers they can't explain and definitely can't expose.
So Mira and Rosie do what any responsible older siblings would do: they hide Peanut's abilities, clean up the chaos, and insist everything will be fine until their parents return. Easy, right?

But things quickly spiral when rumors of a dangerous werebeast spread through town and a mysterious monster hunter arrives looking for answers. Now the sisters must juggle training, secrecy, sibling chaos, and a growing supernatural mystery that threatens to expose everything.

Perfect for readers who love:

- laugh-out-loud sibling dynamics
- magical creatures and hidden powers
- monster mysteries with heart

$28.00
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