Adventure Island (2011–2012) — book series in order

Manyebook

The Mystery of the Cursed Ruby (2011)
The Mystery of the Vanishing Skeleton (2011)
The Mystery of the Dinosaur Discovery (2012)
The Mystery of the Drowning Man (2012)
The Mystery of the Invisible Spy (2012)
The Mystery of the Smugglers' Wreck (2012)