The 1981 Basic/Expert books contain arguably the most beloved fantasy adventure gaming rule set of all time. Beautiful in its perfectly balanced simplicity, this edition of the game has a timeless elegance and enduring popularity. The B/X Essentials line is a restatement of this classic rule set, given a fresh, new presentation focused on usability: • Basic and Expert rules seamlessly combined. • Streamlined layout optimized for ease of reference during play. • Meticulously researched: a guaranteed 100% accurate rendition of the classic rules of yesteryear. • Carefully clarified, ironing out ambiguities in the original rules. This fourth book presents all of the classic Basic/Expert monsters in a new, easy-to-reference format, optimized for use at the table.