In the sixth laugh-out-loud adventure from BLUE PETER BOOK AWARD-shortlisted Marcus Sedgwick and Pete Williamson, Elf Girl and Raven Boy make their way to Creepy Caves for a final showdown with the Goblin King.

Eep ... The final adventure awaits!

Nothing can stand in the way of Elf Girl and Raven Boy saving the world...

Well, almost nothing. Just a sea monster, a dragon, and rivers of molten lava. Not to mention some seriously Creepy Caves. Defeating the Goblin King might be harder than they thought.

The sixth laugh-out-loud adventure from BLUE PETER BOOK AWARD-shortlisted Marcus Sedgwick and Pete Williamson.