If so, they may be interested in the below kickstarter for the Warlock of Firetop Mountain.

Tin Man Games has done several Fighting Fantasy game books already, mainly on iOS but also some on PC. I have enjoyed these, though they are for the most part just the gamebook digitised (though with a few helpful additions like bookmarks and achievements which allow you to see what you may have missed).

For this one they look to be trying to change it up a bit, looks interesting to me so I have supported it.