Series addition

Hi! I am trying to add a new collection of books and put them in a series. I entered the books into my library but I cannot manage a way to add them to a series. The series is Masterpieces In Colour. I inherited 10 books and most of them are not in other peoples series. Can someone help simplify this process please?

>1 ldr259: This isn't a bug, just needs some work. I've combined 3 separate series into a single one, so they are all now at https://www.librarything.com/nseries/89702/Masterpieces-in-Colour

If you books do not appear there, click on edit series on the right, then add works

Edit: If the book is in series already, but yours doesn't show, it needs to be combined with those

Closing.