I have asked a similar question here on meta: - [Why are book recommendations off topic, but software recommendations on topic?](https://music.meta.stackexchange.com/questions/878/why-are-book-recommendations-off-topic-but-software-recommendations-on-topic) were, a mod (Dr. Mayhem) answered: > [...] software recs are on topic, but that some can be, **if the question is written well**. I think book recommendations should be treated similarly to software recommendations. > [...] but as there is this uncertainty[...] From what I remember, there have been some well written questions that were allowed, because they simply weren't of the format > suggest me some books for X! but, they included research etc. But, generally, these kind of questions get closed, because every user has something different to suggest; thus it is opinion based; thus off topic. The Chat is a good place to discuss these things.