Help! Help! Help!

Around 1995, I read a literature book about 2 villages close to each other.

I think one of them is called ogodo or igodo or ugodo.

Anyway, there was a tunnel which led to the place where they could gain new skills and knowledge.

but they had to face a lot of dangers amd they turned out white at the end.

Does anyone know the title, author and where it can be bought?