My opinion though on the original post - "What Books Should be Studied as Scripture?", is that any book or writing that testifies of truth and is supported by the Spirit can be considered scripture. But that may be different for everyone - as the Spirit testifies of different truths to everyone, at different times, and when they are ready to receive them. For example, my mother believes that Apocryphal writings are garbage because of a quote by Joseph Smith and that we SHOULD NOT read them (because they can "lead us astray....", etc...). So if she were to read them, she may not get anything out of them, and they certainly would not be scriptural for her. I have read a lot from Apocryphal writings and have had the spirit testify of some amazing truths and nuggets I've come across that helped piece together other things I was studying... so I believe that those things could be considered scripture FOR ME. Even with the canonized scriptures - as has been discussed, we still need to Spirit to testify of the truthfulness and accuracy of those, and to validate or correct our understanding, and to discern which things are not accurate or not sending the message that was intended.