I'm still reading 'hard-boiled wonderland and the end of the world' from Haruki Murakami and.... I don't understand what is going on. XD

I already read 1/3 of the book and it still doesn't make any sense for me.

I more and more get into the story of 'hard-boiled wonderland', but 'the end of the world' is too abstract for me.

And where the hell is the connection between those two stories?