'Milo is an angel. He is in Year 5 at The Academy, the most exclusive school in the citadel.
He has three good friends - Adelaide, Xanthea and Oliver – and, together with a parrot called Polygon, they form the Double Diamond Gang which is dedicated to fighting crime in all its forms.
The gang is faced with their greatest test when they oppose an adversary set on destroying everything, and everyone, they know.'
Source: Publisher's blurb.