Question: Does TSS ( text to speech) work on non kindle books? Does anyone know if it will work with .pdfs on the DX. I was reading the DX users guide and it says that TSS works on books "where allowed by rights holder". Now I had thought it was default working but they had to options to refuse the right. Which would imply that non kindle purchased books would be fine. Anyone tried it on the K2 with a non kindle book?