Overall theirs a few things that can be said about this book but their isn't much that really needs to be said. Its a decent gamebook targeted at the audience who read fighting fantasy books growing up.
Its not remotely fresh or new, and the plot could not be more cliche (a wizard has gone rogue and evil, and only you can stop him!) but its competently executed and generally pretty fair (especially as the Hero Point mechanic lets you reroll any die roll, avoiding the luck screw element of many other gamebooks). The encounters aren't anything special but do at least require a little thought. The path through the adventure is mostly linear, but their are a few turnings where you might have a chance to find useful items. Theirs a small class system which is interesting(WIzzard, Warrior or Rogue, which translates to some small tangibly related perks), though one of the classes is clearly better than the other. The fighting is a little better than fighting fantasy, while still being fairly simple (take turns rolling to hit defence, attacks deal fixed damage based on what they are minus armour. Health points are low enough that this actually means swift meaningful combats).
It will probably take you a few attempts to beat the book, partly because theirs a small trial and error aspect (nowhere near as bad as some fighting fantasy books, thankfully)
Overall this is a decent but not exceptional book. Its about as good as a mid range Fighting Fantasy, on par with something like Stormslayer (not as good as Howl of the Werewolf or Night of the Nercomancer, but a helluva lot better than Blood of the Zombies or Bloodbones) its not something I'd recommend every person race out and buy, and its certainly not worth buying a kindle for, but if you own a Kindle and you have the hunger for a fighting fantasy like book, this is definitely worth checking out.