G.T. Karber is a mystery writer, computer programmer, and the creator of Murdle, the USA Today and #1 Sunday Times bestselling murder-mystery puzzle book series. The first two paperback volumes of Murdle were published in 2023, with the third volume published in March 2024. In 2023, Murdle was the UK Christmas #1 bestseller, making Karber the third non-British author to achieve a Christmas number one, after Dan Brown and Michelle Obama. He earned his MFA from the USC School of Cinematic Arts. 

Among other things, G.T. and Carter discuss what the goal of writing is and how to determine success in writing, the art of creating puzzles for the general public, and keeping commercial writing simple. At the end of their conversation, they make up a suspenseful story using a line from Stuart Turton’s The Last Murder at the End of the World.