I have a plot of a book and I need the title.

[chrisgreen]

Hello,
I have a short plot of a book (I need its title and author).
This book is for children.

There's a hero who is trapped by his foe. Now he needs to take part in a very dangerous competition.
He doesn't know that the competition is a death sentence for him or for a person he wants to share the victory with.

Any help would be appreciated .

Regards, Chris.

 

[Lovecraftian]

Might need a tad more information...

 

[chrisgreen]

Might need a tad more information...

I'm sure that the autor is either from the UK or US or New Zeland or Australia.