[Sabardeyn]

Phlos,
If you are looking to create a unique sort order for your library you will have to do as DoctorOhh has suggested, which is to create a custom column or derived custom column to store the data.

What theducks was talking about might not have been clear. You mentioned columns title and title_sort - which already exist in the calibre database and are reserved column names. So your request to create a "title sort" looks like you want to simply change the way calibre handles sorting.

To change the existing title_sort function there are a few tweaks under Preferences>Tweaks that can be changed. This includes whether or not Articles of Speech (A, The, An, etc) appearing at the beginning of a book title is used or ignored for the purpose of displaying books in order in the main book view. Another tweak allows you to specify user language and that language's equivalents to the Articles of Speach. Or you can add completely new words to the Articles listing. There are others as well.

Perhaps we've misunderstood what you wanted to accomplish with your request to add a "title sort"? In that case, post a few of the problem books. Give us the correct title and the incorrect title so that we can see what is wrong and recommend how it can be fixed.