I Used to Be Friends with Greg Heffley is a fictional book that was imagined by Greg Heffley in The Ugly Truth when Greg and Rowley Jefferson lost their friendship.
Greg says he would go on to be rich and famous but even so Rowley will always finds a way to get on Greg's nerves and capitalize on his fame. Looking at the title the book would be about Rowley's childhood and his experiences with his former best friend.[1]
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- ↑ The Ugly Truth, page 5