Print Books

For my print book I wanted to do a series so originally I had chosen another book by this author called Autumn Bones in the series Agent of Hel. I thought that it would be old enough since it was published in 2013. However, when I looked it up in WorldCat it had been recorded in using RDA. I chose Kushiel's Mercy as it is book 6 in the Kushiel Legacy series. An issue came up when I looked up the title in OCLC authority to see if it is traced or not and it did not show up. Somehow it did not get recorded as a series although it clearly is. I looked up all the other books in the series and none of them have an authority file either. I assumed that it is untraced so I included the 490 field and the title of the series as it states on the back cover.