It's hilarious to come to these forums and find people like you insisting they have the answers or, as you seem to think, that there is no problem to begin with, when you either are not reading the posts or do not have the wit to understand the issue. Those posting here used to create playlists of multiple audiobooks which would then play in order without the need to do anything other than start the playlist playing. With Apple's switch to putting audiobooks in their iBooks app in iOs, they took away the ability for users to create playlists like that. These folks find that a step down from what they used to be able to do with audiobooks on their iOs devices. Despite your assertions you cannot play playlists of audiobooks without doing oddball workarounds or using thrid party apps so, YES, that is something those posting here consider a problem.
Your condescending advice is not helping, and worse you don't even understand the questions.
For those still looking for something more than a workaround or using a third party app somehow, Audiobook playlists do still sync and work on iPods like the classic or nano. Unfortunately Apple doesn't think you need the ability to play a playlist of multiple books in iOs 9. Having Audiobooks in iBooks is dumb to begin with... I never kept my audiobook CDs on my bookshelf. I kept them in my CD rack. These are sound recordings, not written words or images.