Earlier today it was noticed that there were lots of Warhammer 40k Codices that were No longer Available. This is a follow up to that, were sources are saying that this is because of a quality control issue. See more below.
Please treat this as a rumor
via anonymous sources on Faeit 212
All of the Codizes are being reprinted as softback in the future. Games Workshop will stop making Harback Codizes. The quality of the hardbacks printed in China is not satisfying enough anymore for GW. So there will be no more Hardbacks until they have found a better solution/supplier.
There might be an exception for new releases for a short time.