I grew up with the Choose Your Own Advenutre style of books ~ Warlock of Firetop Mountain, The Citadel of Doom, City of Thieves et al. I read others but the Fighting Fantasy series by Steve Jackson and Ian Livingstone books were my staple. I saved up pocket money and bought the next one - always increasing my shelf of green spined adventures.
I was interested therefore to read this article on some of their evolution and loved the bit at the end about Utopia - options outside the choices. Even if you don't read the article it's worth skimming to the end just for the final few paragraphs.