Books that are part of a series, are not listed as a series

[Darren]

“ kiss her goodbye” by Robert Gregory Brown, is the first book of the, fourth dimension series. However, good reads does not have this listed as a series, as far as I can tell, there are three books in the series. Book number two, is called, whisper in the dark. Character mode insertion point at end

[Arenda]

Due to a misspelled author name, it was quite tricky to find the books you are talking about.
These are the books:
https://www.goodreads.com/book/show/1...
https://www.goodreads.com/book/show/3...

Adding a link to the book(s) on GR when making a request is really appreciated.

Are there characters/a common universe shared between these books?
Just the fact that these are linked in a series on Amazon is not enought to create on here.

The author bio on GR seems to confirm that the Fourth Dimension Thrillers are not actually a series: "including the bestselling TRIAL JUNKIES series and the FOURTH DIMENSION THRILLERS.