If it's on his Kindle, I was just informed that Amazon lost the rights to that and a bunch of other apps (all the "read to me books" like Dr. Seuss), and a bunch of other apps will be coming off of their downloadable content in the next few months. I tried downloading it onto my phone, and it's not available from the App Store either. Both of my kids are devastated. All of their favorites are completely gone. :(