This is not the same planet or characters as the Metsada series. It may be set in the same universe, so it could be called part of his Thousand Worlds series, which Metsada is also part of. The audible editions of these books repackaged them and seem to be lumping them together and confusing the order based on the reviews on Amazon.
I'm not familiar with this author's works, but to be a series, books should have characters and/or universes in common So, it sounds to me that same universe is enough to qualify as part of the series. Science Fiction & Fantasy Literature, 1975-1991 also lists it as METZADA #1.
Here is a copy of the book for sale on amazon: https://www.amazon.com/Ties-Blood-Sil...
This is not the same planet or characters as the Metsada series. It may be set in the same universe, so it could be called part of his Thousand Worlds series, which Metsada is also part of. The audible editions of these books repackaged them and seem to be lumping them together and confusing the order based on the reviews on Amazon.
https://www.amazon.com/Not-Glory-Thou...
https://www.amazon.com/Ties-Blood-Sil...