Question : Problem: iphone - audiobooks

I have added a audiobook to iTunes library.  I have a Iphone but I am unable to add it to iphone.
I tried to drag the icon but that does not work.
Do you know what I can do?

Answer : Problem: iphone - audiobooks

Is the audiobook in mp3 format? Remember that if it comes with some other audio codec it may not play on the iphone unless you have the corresponding codec installed. You should be able to see the encoding in the file properties.