Growing up I couldn't get enough of the Fighting Fantasy Novels by Steve Jackson & Ian Livingstone....
I'd buy the latest book from the local book shop and then hole up in my room with a dice and a piece of paper and play the hell out of that book.
It felt like they were endlessly re-playable / re-readable.
They were the books that really got me into playing role playing video games as I always wanted to be able to recreate those experiences on a computer screen....