G. T. Karber grew up in a small town in Arkansas, the son of a judge and a civil rights attorney. Now, he is a mystery writer, computer programmer, and the creator of Murdle, the USA Today and #1 Sunday Times bestselling murder-mystery puzzle book series, now in 28+ languages.

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.