PanThe Wall Street JournalHer career, it seems, is one of the most interesting and compelling you can find. Considering all this, it’s disappointing to read Ms. Sharapova’s autobiography, Unstoppable: My Life So Far. The book has a few worthy bits on her childhood and career, but mostly it lacks depth and drama—everything sounds too simple and smooth. If this version were a draft, it would be a solid one, fit to be reworked into a fine book after her retirement. At the moment, though, it is too little too soon ... Ms. Sharapova, assisted here by the journalist Rich Cohen, can’t be accused of dishonesty, but she stays too far away from emotions, especially those involving her and her family ... For tennis fans, the most important revelation of this book is that Ms. Sharapova’s previous plan to retire around her current age no longer works. The suspension has driven her to play until she can’t play anymore. 'Now I think only about playing,' she writes. 'As long as I can. As hard as I can. Until they take down the nets. Until they burn my rackets. Until they stop me. And I want to see them try.' Maybe when she is done, she’ll make this account more complete, too.