It’s important to us at Wizards of the Coast that our customers are delighted with the quality of the product they receive. After an internal review we found the product didn’t meet our manufacturing standards. Unfortunately, making this right will delay the release of the physical product, both directly from Wizards as well as our retail partners.
The digital release of The Book of Many Things will not be impacted by this delay and will still release on Tuesday, November 14.  Purchasers of the physical + digital bundle will still receive early access to The Book of Many Things on Tuesday, October 31.
We are sorry to those of you who have put in your preorders already or planned on picking up your copy on November 14. We believe that delaying the release of this product will ensure it is delivered to you in the way our team envisioned it.
Thank you,
The Wizards of the Coast team