[…] resembles the popular LasseMaja books – with the difference that this book is much better. The plot is stronger as the character portraits are better and the relationships between the characters are more developed.
Kommunalarbetaren (Sweden)

There are several wonderful characters in the book […] it’s easily read with well written prose. You just want to read on to find out how it will end! Expressive illustrations that sparkles and lifts the reading experience.
5 out of 5 stars, BTJ (Swedish Library Service)

Henny finds a note on the library’s notice board: “Assistant Detective wanted!”. If she can solve the mystery of the vanished cat she will become the assistant of the one and only Balthasar Brown! Together with her friend Otto, Henny starts her investigation and discovers that the cat Flame is not the only animal vanished. On her journey she must face Frederick, Balthasar Brown’s scary nephew, who is determined to make Henny and Otto fail their mission…

Illustrated by Bjørn Rune Lie.