From the creators of the bestselling hit This Book Is Perfect! comes a hilarious sibling showdown about learning to share... even when you really, really don't want to!

Finn the Frog is used to being the star of the show--just him, the reader, and a story that (usually) goes exactly how he wants it to.

But when his sassy little sister Fifi hops in for a visit, she's not just stealing the spotlight... she's...

From the creators of the bestselling hit This Book Is Perfect! comes a hilarious sibling showdown about learning to share... even when you really, really don't want to!

Finn the Frog is used to being the star of the show--just him, the reader, and a story that (usually) goes exactly how he wants it to.

But when his sassy little sister Fifi hops in for a visit, she's not just stealing the spotlight... she's hijacking the whole story! From pizza topping debates to TV remote battles, things quickly spiral into froggy chaos.

Will Finn ever get his book back? Or will the reader have to step in and settle the score?

Order your copy of This Book Is Mine! today and dive into a wildly silly adventure about family, forgiveness, and finding joy in making space for others.

For kids ages 3, 4, 5, 6, and 7, and grades K-3.

Other books in the Finn the Frog Collection:
This Book Is Perfect!
This Book Is On Fire!
This Book Is A Mistake!
This Book Stinks!
This Book Is Viral!