Cain was before the law :)
God’s word always comes before man’s word .
These books are not for making doctrine .
That’s how the Pharisees got into trouble with Jesus ,
they were putting man’s word above God’s word.
Everything that doctrine is set by must come from scripture.
Remember the concept of Purgatory comes out of historical writing and it goes against scripture and is dead wrong.
It’s actually deadly wrong.
Get yourself a copy of the “extra Biblical” books from the HalleluYah Scriptures site: https://www.halleluyahscriptures.com/six-new-books/ These are the folks who had the warehouse in Porto Rico that recently survived the Hurricanes untouched when everything around the warehouses was flattened. They have gone to great lengths to take man’s words out of YHWH’s books. You do know that “God” is one of Satan’s nicknames and that LORD is English for BAAL, don’t you? If you don’t you might want to order a restored names Bible, as well.
You can also find straight English translations of the Book of Jasher on Amazon. There are even Kindle editions.
Then, just read it. As you read it go back to your Bible to see where each story fits into it. You will recognize many of the connection points because the verses are the same in both books.
But, as I said before, if you haven’t read your Bible enough to know it by heart, then read it until you do. The Word is to be written on your heart. That is what is says.