The questions voted on-topic seem weighted rather heavily to "what book should I read next?"-type questions (by author, style, series order...).
Is this the desired aim of the site? I have difficulty imagining what expert-level questions might be asked in such a forum - except perhaps seeking extremely obscure books and topics - and a lot of the example questions seem to me to have easy answers readily available (e.g. Wikipedia, fan sites, "People who bought this book also bought..."). On the Theater.SE proposal, there was well-reasoned opposition to even allowing recommendation questions, so seeing them as central to a proposal seems like it might be worrying.
Is this type of question really as central to the intended definition as the definition questions make it seem? If so - where do expertise and quality come in?