consider how Josephus described the Book of Jasher. He said "by this book must be understood certain documents kept expressly in a safe place, giving an account of what happened to the Hebrews from year to year, and called Jasher or the Just, because of the fidelity of the annals. " There is no better description of the book you see before you. The bottom line is that you, as a reader, will have to answer the legitimacy question yourself. Whichever side of this question you take, I think you will be enlightened by exploring the question and reading the book. If you feel like me, that this book has powerful powers to recommend it like Jasher's biblical book, you will now have in your hands a source to investigate while studying the Bible. You will also have food for thought regarding matters of conventional chronology in ancient times.
"Isn't it written in the book of Just?" - Joshua 10:13.
"Here it is written in the book of Just. - II Samuel 1:18
Paperback: 217 pages
Publisher: Independently published (December 30, 2019)