bizancio series?

The series Bizancio by Gillian Bradshaw does not seem to be a real series in the sense that the characters and places are not the same and I cannot find any other reference to these books as being part of a series. Anyone know anything about this?

The Byzantine set books are listed together as a series here as well: https://www.fictiondb.com/author/gillian-bradshaw~769.htm They were published over a three year period in the same setting, I don't think they have to share characters to be recognized as a series.

From the series Edit History, it appears the series came originally from the Spanish-language LT (back when series formed part of CK), and accordingly, in the Series Name, "Bizancio" is set as the Spanish name.

So one thing that could help is adding an appropriate English name, since we would call it Byzantium rather than Bizancio (I don't know these books or author so will leave that for someone more invested in the matter).

The other possibility, is if they were only marketed as a series in the Spanish-language editions, is whether that makes it a Publisher Series only. Personally I don't think that's appropriate here because I agree with >2 Aquila: we can be quite flexible with what counts as a series, eg. if they are set in the same fictional universe, and this one sounds series-y enough to remain as a full series, to me (though again, disclaimer as in paragraph 2).