You're running a rather old firmware version so perhaps it's different, but in my experience those booklets just get "pushed" towards the end of the list as you open some actual books. So if you open a few books from your library and don't use the booklets, they should eventually go to the last page of your library.
In the case of KUAL, there is an extension to give it an icon, so it's not as ugly; you can find it here:
https://www.mobileread.com/forums/sh...6&postcount=15