Need to find object by XPath

I have a form and I want to select the first button. How can I replicate this xpath property in Katalon?

(.//*[@id[starts-with(., ‘STONF2017’)]]/a[@class=“book-btn”])[1]


thanks. I tried it but I also had a and href tags being set to “Detect object By”. Once I removed the other properties, it worked.

Just add ‘xpath’ property with that value, e.g: