Please link my books

[Terry]

I have two series, Seeing is Believing and Seeing is a Curse and the other is Web of Secrets and Price of Secrets. I didn't know you could link a series together. Thank you.
https://www.goodreads.com/book/show/2...
https://www.goodreads.com/book/show/3...
https://www.goodreads.com/book/show/2...
https://www.goodreads.com/book/show/3...

[Arenda]

Series created for "Web of Secrets": https://www.goodreads.com/series/2188...
For this series, both books mention the same characters in the description.

For "Seeing", I don't see an immediate connection between the books from the descriptions.
From the librarian manual: To be a series, books should have characters and/or universes in common.
https://www.goodreads.com/help/show/2...