Bottom line up front (BLUF): 6 USD is entirely too high a price for what you get. The group mechanics for overcoming challenges is interesting and looks like it could be really effective for narrative style gaming. This is a very lite set of rules. The author frequently points out that it can be used with other systems. Use the oracle with your favorite system to use those rules while running solo or use the mechanics in place of the rules of your aforementioned favorite setting. In other words this is just a quick set of rules to run your favorite game/setting using other mechanics and... There are some quick tables for jumping into a randomly generated setting. FATE does that better. The oracle could be easily replaced by Mythic or any other solo system out there (the oracle is very basic). The only really original (at least to me) bit is the dice pool system for overcoming challenges.
The book lacks art. It has few (and basic) examples. There are no pre-generated PCs or settings. The page layout wastes a lot of space. I imagine the book could have been done in half the pages.
I have a soft spot for solo games. This one presented one unique (and effective) idea for running challenges. The rest of the rules are done better elsewhere. So for just the unique group creation/rules in a solo setting it deserves a 3 star rating. If there were more to these rules it might be worth 6 dollars, right now I couldn't recommend more than 1 or 2 dollars at most.
[3 of 5 Stars!]