The Light Thieves and the Terrifying Dawn

The third and final action-packed eco-techno-adventure in The Light Thieves series from Helena Duggan, bestselling author of A Place Called Perfect.
URGENT!
People now know that the sun is being stolen by tech-billionaire Howard Hansom.
The only person who can stop him is the mysterious White Rose. She must keep her identity a secret, so she's been sending out coded letters. Each of these letters leads to a separate piece of a larger puzzle that when solved could save the sun. Young heroes Grian, Shelli and Jeffrey have tracked the White Rose to the city of Quantum. But can they find her before the sun is extinguished?
Join them on the treasure hunt of a lifetime!