The Fibonacci Revelation waffles under and on top of

under and on top of the sea to find her hairy best friend - and bring him back home

a little girl named Avani

But comfort can come from the most unexpected of places – an intriguing girl on a mission to solve a decades-old treasure hunt

If that weren’t bad enough

Discover an underground world full of tunnels and mystery in this middle-grade adventure from the bestselling

The Fibonacci Revelation waffles under and on top ofWritten by Radhika Puri paperback 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 the patterns behind the chaos. It's up to him, and his only friend Clara to follow the strange clues to uncover a dark secret before it