Originally Posted by novalovesmel
The titles are lengthy (has book name, author name as well as series information). Will renaming them work?
How many chars ? 100 ? more ? Make a backup and try renaming (why not ?). Avoid spaces and national characters (characters with accent etc.)
I'm actually talking about metadata, which is some piece of information inside the epub-file and should be displayed on the device. You'll need an epub-editor to change them, like Sigil. They definitely can cause problems on some readers if they are too long.