I often get asked about the Book of Jasher. Here's the recent Fringepop321 episode on the topic as well as the episode web page.
Book of Jasher
Book of Jasher, Chronicles of Gad the Seer
I am frequently asked for my opinion on the Book of Jasher and the Book of Gad the Seer (more properly called the Chronicles of Gad the Seer, per 1 Chron 29:29). There are books by both titles floating around (typically on the internet) that purport to be these...
The Mysterious Book of Jasher
That's the title of this scholarly article by rabbi Arthur Chiel I recently found in an old issue of the journal Judaism: Chiel-The-Mysterious-Book-of-Jasher The article is a very good survey of the history of what some folks (even today) tout as a lost biblical book....