This collection of double-entry account books, kept by the family of a merchant named Bak Jae-do, whose business was based in Gaeseong (now in North Korea), consists of fourteen ledgers and various other related documents.
The account books are regarded as valuable historical materials on the development of accounting in Korea as they contain the details of an entire double-entry accounting system — journals, general ledgers, main and auxiliary books, etc. — and constitute a valuable source of information about the principles of accounting and profit sharing between investors and managers.