For themes that are more conceptual (emotions, friendship, etc.) than practical (flowers, colors, etc.), look to Subject Tags in the library catalog to find books. Use the Advanced Search, select Subject, then search using your theme.
![Advanced search showing Curriculum Materials Center selected, "subject" selected, and search term "feelings."](https://libapps.s3.amazonaws.com/accounts/69801/images/advanced_search2.jpg)
When you find something good, scroll down to the Subject Tags, and click on the right one. You will get a list with everything tagged with that Subject Tag.
![Screenshot of a book record showing details. "Subject" and relevant tags of "emotions" and "emotions in children" are highlighted.](https://libapps.s3.amazonaws.com/accounts/69801/images/subject_tags.jpg)