 The "Rules Cyclopedia" contained all the major rules, compiled and revised from the "Dungeons & Dragons Basic Rules", as well as the "Expert Rules", "Companion Rules", and "Master Rules" boxed sets.However, the book's introduction on page 5 states that it is "intended to be a reference volume for those who already play the "D&D" game ... this book is aimed at the experienced user ... [it] lacks many of the examples and patient explanation you'll find in the "D&D" box sets".The same year, a revised introductory "Dungeons & Dragons" set was released to introduce new players to the game.