Radhika Puri: 2 books

In a village set on the slopes of Mount Merapi, 11-year-old Fitri and her younger brother Agus watch anxiously as the volcano comes to life. They have heard too many stories of smoke, fire and the dreaded lahar – killer lava mudflows. As the village prepares to evacuate, Fitri and Agus stumble...

First, a warning, then a threat. An attack that leaves a series of seemingly-innocuous historical photos destroyed. A coded message that no one sees... No one, except Owen, the school’s resident freak. Only Owen can see the obscure mathematical concepts behind the clues. Only he can see...