One of the sweet things about games in general is that they can be played with the people you love. In terms of gamebooks, there are a few experiments in this area coming from Great Britain (The Blood Sword Series, Clash of The Princes).
I know Hosted Games provides little restrictions on what is to be put out under the trademark, so there will be no problems with it.
My idea is, if the protagonist is supposed to have a partner throughout the adventure, why don’t make both of them playable? In the ideal case, a couple would gather together to play it. If not, a single reader could make the decisions on behalf of both characters.
The downsides? Well, it will no longer be a game in which YOU are the hero (which sounds good but it is rarely the case; please, don’t send the real ME to fight demons and vampires, please) but a couple of characters and it seems it must be written in third person (‘Lauren saw the dead body’, not ‘You saw the dead body’). Of course, there could be the usual level of customization that will increase replayability and you may be able to pretty much generate the character you want (choose whether Lauren should be a werewolf, a witch or a vampire).
Another - some of the decisions must be taken together. The one playing Lauren may decide whether she should turn into a werewolf but after the battle, both players should decide where to go together.
What would you guys say about it?