If you're looking for something short to read, this book is 5 cardboard pages long.
A couple of critiques:
1. There is little to no character development. One is expected to know who the main protagonists are going in.
2. There is mystery, but it is implied, and the plot never really develops. On the 4th page it says "Anna and Elsa always work together to find a way". This is probably my biggest issue with the book. You don't know what they are working together towards, nor what "find a way" means, and this is never really explained.
2/10