A Beastmen army book was never written for the Eighth Edition of Warhammer Fantasy Battles. Although the Beastmen army book for 7th edition was one of the last 7th ed. army books, and presumably written with 8th edition in mind, the book falls sort of par compared to other army books (though using a Beastmen army as part of the Legions of Chaos army in Warhammer: Glottkin fixes some problems). Even so, the 7th edition Beastmen book lost something in my eyes. Under 7th/8th edition they became just another kind of Orcs & Goblins army - Gors (Orcs) and Ungors (Goblins) backed up by chariots and monsters.
On the other hand, the 6th edition Beastmen army book, Warhammer: Beasts of Chaos, perfectly captured the character of an unruly host of chaotic Beasts with a unique playing style. So in attempt to update Beastmen armies for the Eighth Edition of Warhammer, I decided to update the 2003 Warhammer: Beasts of Chaos army book for Eighth Edition, rather than updating the 7th edition Warhammer: Beastmen.
As always, I appreciate all comments, thoughts, and opinions regarding this erratum, and please try it out in your games of Warhammer. Happy gaming!
Note: you will need a copy of Warhammer: Beasts of Chaos, Warhammer: Warrior of Chaos, and Warhammer: Storm of Magic in conjunction with this erratum.