It is the rare author, especially of a nonfiction book, the category of literature most likely to have a section titled "Acknowledgements," who does include some reference to those individuals in the author's personal life who were helpful in any number of ways. Family members of authors are required to be exceptionally patient with and forgiving of the loved one whose time is inordinately occupied by the research, writing and rewriting of a book. Such activities invariably occupy most of the author's time and energy, which means sacrificing interaction with the family. Michael Lewis is no exception. An author of a number of well-received nonfiction books, including Liar's Poker, The Big Short, and The Blind Side, in addition to Moneyball, Lewis devotes considerable time to researching the subjects of his books. He interviews many of the individuals involved, and communicates back-and-forth with additional people to ensure he has as accurate a portrait of the situation in question as possible. All of this means time away from home and time spent isolated in a study working on a typewriter (an ancient device once used for mechanically writing literature) or on a computer. Spouses of authors must be temperamentally well-suited to such a life, or one of two things happens: the book doesn't get written, or the marriage fails. That is the reason the final sentence in Lewis' "Acknowledgements" section at the end of Moneyball includes the following sentence:
"For help in just about every phase of this project I am grateful to my wife, Tabitha Soren. Her official stats, impressive as they are, still don't do justice to her performance."
One can read into this a couple of interpretations, but suffice to say that Tabitha Soren was a supportive spouse during the time Lewis was working on his account of the Oakland Athletics' baseball organization.