Unlike earlier editions where Chaos was split into confusing sub-factions (Hordes of Chaos, Beasts of Chaos, Daemons), the 8th Edition book streamlined the mortal followers of Chaos. It focused on the heavily armoured warriors, the barbaric Marauders, the monstrous Chaos Trolls, and the terrifying Chaos War Mammoths. This book represented the faction at its most balanced, brutal, and beautifully illustrated.

If you look on eBay or second-hand markets, a mint condition Warriors of Chaos 8th Edition hardback sells for anywhere between $100 and $250 USD. For a new player wanting to try the faction, paying $10 for a high-quality PDF scan (or finding a free community scan) is infinitely more practical.

Warriors of Chaos Army Rules | PDF | Dice | Fantasy - Scribd

The book includes three unique Lores of Magic dedicated to the Chaos Gods: Lore of Tzeentch

Given that the physical book has been out of print since 2015 (replaced by Age of Sigmar battletomes), the search for a digital copy has exploded for three main reasons: