Thank you for the update. When will we get to see the finished product? I work in game development and I'm looking forward to your next steps.
  
    Hi Charlie,
If you meant the book as a finished product, that will take some more time as I need editing help. I have started talks with chromatic so it is not too far off. However the grant itself is close to finishing I am closing it as I type this. 
If you meant the code the newest release of SDL will be good enough to use. 
The current manual can be picked up at 
https://github.com/PerlGameDev/SDL_Manual/raw/master/dist/SDL_Manual.pdf