The Book of Jasher is an expansive extra-biblical retelling of sacred history, moving from Creation through the age of Joshua with particular attention to the patriarchs, Moses, and Israel's formative struggles. Written in a plain yet highly elaborative narrative style, it amplifies terse biblical episodes with speeches, genealogies, motives, and moral explanations. Its literary context is best understood alongside Jewish midrashic and pseudepigraphal traditions, where imaginative supplementation serves theological reflection rather than mere ornament. Its author is unknown, and the work should be approached as the product of anonymous compilation rather than single-author invention. The title echoes the "Book of Jashar" mentioned in Joshua and Samuel, though the surviving text is not that lost ancient source. Its writer or redactor was likely shaped by a culture of biblical interpretation that sought to harmonize narrative gaps, preserve legendary expansions, and make inherited scripture ethically and historically vivid for later readers. This book is recommended for readers interested in the afterlife of biblical narrative: how scripture was remembered, expanded, and morally interpreted beyond the canonical text. It will especially reward students of apocrypha, midrash, comparative literature, and religious imagination, provided they read it critically, not as straightforward historiography, but as a revealing work of interpretive tradition.