Taking myself away from Humanity H2O for a moment, a few days ago, I got a sale of 'How to Build a Castle in Seven Easy Steps'! Which is nice! Some spill over into other series for me there :-)
If you enjoyed or are enjoying the pleasures of my Humanity H2O series, then how about trying out my 'How to' series, based in a world on the other side of the spectrum, a world of almost no technology and mud. A lot of mud. And cannibals. And soup. Tons of soup.
Of course, you can of course just pick up Book 3 of the Humanity H2O series!