There seems to be a fine line between what is allowed and what is not. Reb Chaim Vital made a Sefer of Goralos.
Either way, these fanciful, this-is-the-ancient-book doesn’t really fly and I wonder if it was even meant to be taken seriously or if it was a cute way of introducing your Sefer, like the Kuzri, KaLaCh Pischei Chachma, and Sefer Hayashar, among others.