Classic Dungeon Design Guide Book II: The Great Dungeon Bestiary (2014)

From publisher blurb:

A major companion work to the well-received CASTLE OLDSKULL: THE CLASSIC DUNGEON DESIGN GUIDE, BOOK 1: FORGING THE UNDERWORLD (CDDG1), this sequel is the great book of monsters, dragons, devils, and all the eldritch horrors who haunt the netherworld. This massive tome is an ideal work for Game Masters conducting pen-and-paper Fantasy Role-Playing Games. Now, with one huge resource, you can populate your entire mega-dungeon in record time with 79 different random encounter tables, 5,000 different classic encounters!

THE GREAT DUNGEON BESTIARY is not only the greatest dungeon encounter generator of all time. This book also includes over 450 monsters and citations for over 1,000 subspecies, all derived from an exhaustive research project which explored the depths of folklore, demonology, occultism and world mythology. This tome includes the most detailed analysis of FRPG links to real-world folklore and netherworld grimoires ever published.

At 635 pages, THE GREAT DUNGEON BESTIARY is both exhaustively comprehensive and easy to use. Two different random encounter systems are included to meet the harried GM’s needs. The first, Oldskull Impious, is designed to give immediate results for improvised encounters on a moment’s notice; the second, Oldskull Magnus, is a complex long-form 250-page system with the most extensively researched selection of old school dungeon monsters ever offered. Iconic monster pairings (such as ghuls and ghasts, evil elves and giant spiders, fire giants and hell hounds, and so forth) are included and balanced for inclusion in any dungeon.

Best of all, the CASTLE OLDSKULL CLASSIC DUNGEON DESIGN GUIDE series is also system-neutral. No matter which of the many FRPGs you choose to play, from basic skill level to advanced, a first edition or a fifth or anything in between, the lessons you master here will serve you in your gaming for years to come. Learn how to make the most of your ever-dwindling prep time, so that you can spend those saved hours gaming with your friends!