Interesting.

I 've only tried sample of the paint program code for a multitouch device but the program worked with pidroid3(pygame 2.0.0.dev8) on amazon fire8 device.

Since for fire8 , I added code as bellow

```

from pygame.locals import  *

screen = pg.display.set_mode((600,800),SCALED)

```

Fire 8 seems to recognize up to 5 touchpoints at the same time.

I don't think this limitation caused by paygame._sdl2.touch , but it's interesting ...

I think it's hard to write a book , but I think it's a interesting challenge.

The illustrations are also very good.

Thank you.