I'm not sure which is the very latest Karen Pirie novel as I haven't checked recently. You could try looking on book - selling websites like Amazon or checking with your local bookstore.
In 'Karen Pirie', many aspects are based on true events. The setting of the story, for instance, in a particular city or region might be inspired by real - life locations. The social and cultural backdrop against which the crimes occur is also reflective of real - life situations. The motives behind the crimes, such as jealousy, greed, or revenge, are common in real - life criminal cases. Additionally, the way the forensic evidence is used and analyzed in the show is based on real forensic science practices. All these elements combined give the show a sense of authenticity and make it more than just a fictional crime drama.
Online platforms are a great option. Amazon, for example, has a wide selection of books. Just search for 'latest Karen Pirie novel' on their site, and it should show up if it's available. Also, Barnes & Noble's website is another good place to look. You can also set up alerts on these sites so that you get notified when a new Karen Pirie novel is released.
We don't have enough information to know exactly who Karen is. She could be an ordinary person, a student, a teacher, or just someone who likes to read stories.
Given only 'dateline karen read story', Karen's identity remains a mystery. She might be a staff member at Dateline who was reading a story for work purposes. Or she could be a person who was interviewed by Dateline and was reading a story during the interview, or she could be an ordinary person whose story - reading experience is being highlighted in relation to Dateline.