Old-School Essentials: Reference Booklet (2026) - Pre-order

This reference book includes rules, tables, and summaries for player characters, game procedures, and monsters, requiring the Old-School Essentials core books.

• The description claims minor rules errata for greater fidelity with the B/X core rules.
• The description claims additional notes on weapon specialisation and multi-classing optional rules.
• The description claims minor updates in line with the upcoming 2026 Update OSE core books.