[AaronBurns]

A choose your own adventure book can only be won one way. They are usually small books. If you print every other page upside down with two covers upside down to each other in one book, each with the same adventure but, many more ways to win. Two Choose Your Own Adventure Books in One Book. Many more ways too win since, sometimes I disagree with the books choices for loosing at it.

Reward: Just to be able to cram as much book into the smallest space. HA!

[joejlitz]

I used to love these books!

But I must tell you, even when I was reading them 25 -30 years ago, some of them did have multiple ways to "win." It wasn't the upside down concept you mention, but there were alternate favorable endings.

Here's their website: http://www.cyoa.com/public/index.html