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Release [Chaosium] Announcing the Malleus Monstrorum - Cthulhu Mythos Bestiary

Here, shall you know the terrors of the void, the nightmare bringers, and the unspeakable lurkers...

THE MALLEUS MONSTRORUM - Cthulhu Mythos Bestiary is out now in PDF!

Weighing in at 480 pages, the new Malleus Monstrorum will be coming out as a two volume hardcover slipcase set in October! Purchasing the PDF direct from Chaosium.com gets the purchaser the full price of the PDF off the cost of the slipcase set when it is released.

Volume I Monsters of the Mythos - 216 pages
Volume II Deities of the Mythos - 264 pages

This two-volume collection is packed with ideas, concepts, and insights to immerse Call of Cthulhu scenarios and campaigns deep in the heart of the Cthulhu Mythos. With lore and statistics updated and revised for Call of Cthulhu 7th edition, and all brought to startling life by the illustrations of expert artist Loïc Muzy.

A cavalcade of monsters and god-like alien intelligences beyond human understanding, all vividly detailed and portrayed. With over 250 entries to inspire countless adventures.


— 480 page PDF (both volumes): $39.99*
— 2 Vol Hardcover Slipcase Set: $89.99**
— 2 Vol special Leatherette Edition in slipcase: $199.99***

*remember, if you buy the PDF direct from Chaosium.com, you get the full price of the PDF off the physical product when it is released

**includes PDF in the price if you purchase direct from Chaosium.com, or from a FLGS that participates in the Bits & Mortar program

***Chaosium website exclusive!

The Malleus Monstrorum Slipcase Set will be available from all five of our fulfilment warehouses (USA, UK, Australia, Poland, Canada) in October 2020, and in distribution.

The PDF is available now from Chaosium.com and DriveThruRPG.

Further details...
Rule Set
Call of Cthulhu 7th Edition
Year Released
Full Color PDF (2 volumes),
2 volume hardcover slipcase set (October 2020),
2 volume leatherette slipcase set (October 2020)
Page Count
216 and 264
Mike Mason, Scott David Aniolowski, Paul Fricker Cover
Cover and Interior Artist
Loïc Muzy
Nicholas Nacario


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Mythological Figures & Maleficent Monsters