I've seen a number of discussions on this issue, but not found anyone who has quite the same issue as i have.
I have a subscription to Audible.com and download a couple of audiobooks a month. I use the Audible download manager and copy the files on to a portable hard disc.
With my iPhone, I simply go in iTunes to File/Add file, select the downloaded audiobook files. Then, when i synch the iPhone, the audiobooks appear in the right place.
With the iPad i have tried doing the same. I use the Add file feature. When I look at the iPad on iTunes, the audiobooks duly appear under the Books tab (at the bottom in a separate listing as audiobooks) - giving me full titles, image of the cover and so on. I click on the title, and choose 'Synch selected titles'. But when i synch the iPad, they don't copy across. When I hope the iPod app i am told there are no audiobooks.
I am using a v1 iPad, 3gs.
Anyone have any ideas please?!