I stumbled about this mag back in the heyday of the Ouya. It’s a coloured magazine with 60 pages available on the Kindle Shop. I only know of this one volume. I’d like to know if there were more. You don’t have to own a Kindle to download it, there’s a Kindle App for PC which I use. I think it’s a good resource for starters with the Ouya system and it seems not to be well-known. So I thought I might point you at it.
EDIT 01: I forgot to mention the mag is in German only.
EDIT 02: To be precise it’s the very first issue from 2013.