The first edition of the book was released Friday, but the link to the ePub file still refers to the early access edition of Dec 10.
Thank you for bringing this to our attention @dvheghe. Going to CC this to @samdavies and @mandafrederick to see if they might know more information about this.
Best,
Gina
Hi there @dvheghe, we were slightly behind on ePUB publishing, but this should now be up to date again! 
Sorry for the inconvenience!
Thanks,
Edith