Swift Fox:
I have a very rare type of phone. It has no camera, no screen, and is attached to the wall with a cable.
But how do people let you know they're going to be late five minutes after you're supposed to meet them though :p
The Fighting Fantasty books, or I believe at least Ian Livingstone specific books, are notorious for the 'one true path' where you just have to grind through the books to learn the right path and many choices are not flagged up with clues, and there are only a few mitigation points. I think that's why we love the Lone Wolf books. The Disciplines and the fact you have a cohesive story running through the whole thing make it far more likely you can get through the book and are just exploring it your way. Some of the deaths are more like video game deaths (bad numbers in combat, etc) and if you can drop a save in a video game and try again, why not a gamebook :)
I really liked the TV series Knightmare, which was basically a gamebook on TV. There was never a 'yeah, you went the wrong way, you died' but it was still a very brutal game and few god through the dungeon. The main way they'd lose would be you've have clue rooms with three items, you could only take two, and you needed to take the right two. However, tgere would be a guardian who would ask three questions - get all of them wrong, they died, get more than one right, and they'd be told one of the items that was correct for each additinal right answer. So while they could intuit the right two items, there was also a way using knowledge to know the right items :)