I'll certainly add the loading of a user customized CSS. That will cover your case.
I guess you have this problem only when you have a scroller on the right.
If you choose an author / serie / tag which only have 2 or 3 books, is it ok ?
Please try to change
Try to reduce width to 90 or 95%. Thanks in advance.
I'm always interested in code contribution. So yes please send me your patches (by mail or with github as you prefer)