Hello everyone !!
Forge World had a print quality problem and they decided to delay the release.
Official words :
We know that you were expecting to be able to pre-order the Horus Heresy Age of Darkness Rulebook, but we’re afraid you’ll have to wait a little longer before you can order your copy.
As your constant companion in your Legion’s battles in the 31st Millennium, it’s important that the Horus Heresy rulebook is as good as it can possibly be. Following a print quality check, the decision has been made to delay the rulebook in order to make sure it meets the exacting standards you expect from all Forge World products.
Words on the street is central binding problem :(