Seems like this might be a new tool under scammers belt.
It's closer to begging than to scam. Everywhere in the world people are begging for money under different stories, valid or not.
Even if OP would have the first chapter available, although it would add some credibility (if it's his work!) it doesn't guarantee he'll continue the work.
And even if he finish it, doesn't mean it'll become available for free at least to the donors.
What I find closer to scam, or at least misleading, is the fact he said thank you so far, but he didn't receive a Satoshi until now.
Thank you for your kind donations so far. Here is an updated wallet address which you may donate to.
1MHPdRm957WbKMPYiA1xo2g7erRzJP2YUD