PositiveBookforumIn Unstoppable, Maria Sharapova recounts a similar story: a determined journey from the bitter cold and desolation of Siberia to the warm (at times burning) glow of international superstardom ... All the big matches are relived in a speedy, engaging way, and her prose exudes confidence as she describes her ability to dominate her peers on the tour and how she came to be considered one of the greatest female players of the game. Her writing becomes more vulnerable, frustrated, and interesting when she explores her struggles with Serena Williams ... Sharapova is at her best when she is calculating, but where do the calculations end? Unstoppable itself appears to be part of the athlete’s plan to control her image, to stare down the reader.