As Hombre said, it is paying for the voice talent and production costs. also it is a much lower volume market so the fixed costs like that are a more significan

As Hombre said, it is paying for the voice talent and production costs. also it is a much lower volume market so the fixed costs like that are a more significant hit to the price. Actual printing of books does not cost a lot. the materials are cheap the processes are very efficient at large volumes. That is one reason why ebooks are not always cheaper than the print versions. the print costs are small.