Jess Kerr-Wearne 
Mini Minutes [EPUB ebook] 

In the dark of the room, while William lay in bed. He saw a little fuzzy light floating above his head. He tried to catch it as it drifted up and down, dodging his hands and landing on the ground.
What is this thing? He’s never seen it before. He looked around the room to see if there were more. Should he find where it came from and try to put it back, before it wakes his little brother Jack?
While William and Jack should be sleeping, instead, they are playing with the minutes, watching them glow and grow into hours, until Old Man Time comes to collect them all before it gets too late.