Jack Reacher may be one of the most iconic action book heroes of all time. Over 100 million copies of author Lee Child’s books have been sold. But the author who has taken over the series is perhaps a little less well known. Andrew Child, who also writes under the name Andrew Grant, is now carrying on the legacy of Jack Reacher for his older brother. He came to Portland for the 2024 Portland Book Festival to talk about the 29th book in the series, “In Too Deep.”