From the Visions of Iddo to the Acts of Solomon, from the Prophecy of Aijah to the Book of Gad the Seer: all these books are referenced in the Tanakh yet they are not findable anywhere nowadays. Where have they gone? Hidden in some desert cave? Lost in the course of the centuries? Of course , one could cut off the discussion by saying that : ‘Every book that G-d intended to be in the Tanakh is in the Tanakh‘.
But apart from Dan Brown-like conspiracy theories, which I find rather silly, could someone please give me some more indications about this topic?