Cathy Byrds 2-year-old son, Christian Haupt, was a baseball prodigy who spent countless hours pitching and hitting balls. In her new memoir, The Boy Who Knew Too Much, Byrd shares an ... improbable story that even she had trouble believing at first: She claims that Christian was the reincarnation of baseball legend Lou Gehrig, who played for the Yankees nearly a century ago. Byrd had not believed in reincarnation. But she says she began to explore it based on the statements Christian makes about Gehrigs life. Still too young to read, and not exposed to any baseball lore from his non-baseball-fan family, Byrd writes that Christian shared baseball history he could not possibly have known. When Christian sees a photo of Babe Ruth and Lou Gehrig, Byrd says that her son declared: they didnt talk to each other. Byrd discovers it was true. There was no reasonable explanation ... I found myself straddling the great divide between logic and intuition, writes Byrd, a practicing Catholic. The concept of reincarnation was diametrically opposed to my rational thoughts and my religious beliefs, yet my heart was telling me not to ignore what Christian was ... trying to tell me. Byrd also seeks help along the way from [professor] Jim B. Tucker, M.D., author of Return to Life: Extraordinary Cases of Children Who Remember Past Lives. It was during a meeting with Tucker that Christian delivers the ... news that he chose Byrd to be his mother when she was born. When Tucker asks Christian when he picked Byrd, [he replied], In the sky.