This collection of early historical sources aims to provide a foundational understanding of Scotland's formative centuries. Alan Orr Anderson, a noted historian of early Scottish history, compiles and presents primary documents from the period A.D. 500 to 1286. The work focuses on assembling and contextualizing these crucial texts to illuminate the political, social, and cultural landscape of medieval Scotland.

This compilation is recognized as a seminal work for scholars of early Scottish history, providing direct access to foundational texts. Its value lies in the meticulous collection and presentation of primary sources, offering an indispensable resource for detailed research into the period. The work is typically consulted by academics and serious students of history seeking to engage with the raw material of Scotland's early development. Its scholarly utility is widely acknowledged within the field.