Q: Audiobooks showing up under music

Hello am a little new to Itunes. I love audiobooks and have put some into my itunes library. I have one that is showing up under the Books Library as an audiobook but the other ones are showing up under the Music Library. How can I get them into the books library. I have tried dragging them but won't work and I have tried right clicking on them, going to get info and changing the dropdown at the bottom of the first or second tab to audiobooks but it does not move them. Just wanted them in the books library. Any help would be appreciated. Thanks.