While in iBooks, when I touch the screen, I do not hear the text of the words spoken as I run my finger down the screen. I simply hear a "ping" sound. However, if I do a two-finger swipe down, the text is read to me. It is not specific to any book. This behavior does not happen on my 5th gen Touch, nor on my iPad mini, all of which are running IOS 7. So, I'm thinking this is specific to the 5S. Has anyone else noticed this? I have written to Apple Accessibility about this and hopefully, they can replicate it and this issue will be corrected.