What digital formats are the digital products going to be provided in (PDF, ePub, Kindle mobi, ...)?

There does not appear to be a pledge level where it is possible to get both the Physical and Digital Core Book and also receive all stretch goals digitally, unless the 'Marshall of Grid' pledge level covers this (but it does not appear to). Was thinking of backing twice, once for the physical copy, and then again for the digital copies of the core book and all pledge levels, but this does not appear to be possible.

Hi...I was just wondering if there is a quickstart or some sort of (if you pledge here is a sample of what you would see) for this? By the way, I already pledged (highest tier) and am very excited for this.