A while back I started a discussion on simple.wikibooks suggesting a merger with en.wikibooks. This wasn't any kind of hostile request to close the project, but instead a request that the two projects combine and focus efforts to produce english-language textbooks for readers of all levels. I said when we started the discussion that it was just a friendly suggestion, and that if any of the active community members of that project disagreed with it, that we would drop the issue entirely.
One person did disagree with it, and so the discussion (or at least my role in it) is finished. What I don't want is for that project to stagnate or fade away over time, and I can't help but see that as the path it is currently traveling. However, another idea was suggested that instead of just hosting simplified english texts, that it could host simple texts from all language wikibooks projects. In essence, it would be a multilingual project like meta. I hope that's a direction that they consider, because it would be a way to expand their audience and their library.