You can access the "book" with a search engine, it's not very long, and it goes into pretty horrible details of sinners being tortured with specific punishments for specific sins. I'd call it an interesting historical document, like the book of Enoch and many others that have come down which may have some merit, but these things need to be looked at as separate from the Bible. Plenty of writings are inspired by God, every day Spirit filled Christians are writing what God is wanting them to write, but the Bible is a complete and final statement from God revealing His Son Jesus Christ on practically every page, and we need to accept it as such I think and not try to incorporate extra things into it.