It's been a long road, but I’ve submitted the Animations book to the iBooks Store! They recommend giving 2 weeks for review time, so I’ve set the release date to September 23rd (roughly 3 weeks away) just for good measure. If the book is approved early and I’m able to release it sooner, then I will. If there’s any additional delay because it gets stuck in review, I’ll let you know via another Update.
Thanks to everyone for your patience and support here on Kickstarter! Writing any book is a big undertaking, and when there are interactive elements the task feels even greater. I look forward to hearing about all the great things you create after reading CSS Animations: An Interactive Guide!