The Book of Jasher

The Book of Jasher (Sefer haYashar) is a non-canonical apocryphal book. It is mentioned twice in the Hebew Bible - once in Joshua 10:13: 'And the Sun stood still, and the Moon stayed, until the people had avenged themselves on their enemies. Is this not written in Sefer HaYashar?', and once in Samuel, 1:18: 'To teach the sons of Judah [the use of] the bow. Behold, it is written in the book of Jashar.'
There are several separate works by this title, all composed much later than Biblical times. This particular one is a translation of a Hebrew book printed in 1613. The Hebrew title of the book means 'Book of the Upright', but the title was at some point, treated as a proper name - Jasher. The text of the book covers the creation of the world to the death of Moses, with several minor variations to the traditional Bible.