Avni and the Colour Thief - Dushala Mistry

Avni Mistry is a little girl who likes nature, animals and mysteries. In this story, she wakes up one morning to find the colours outside her window gone. She decides to turn detective and solve the mystery.  After following the clues, she finds out someone is stealing the colours from nature in her neighborhood. Avni realises that she not only has to solve who did it but also, perhaps more importantly, find out why.