I was able to sneak a peak at the Sasha Cohen excerpt of If I'd Known Then yesterday. It was very short, and included an interview with Cohen and then a letter Cohen wrote to her 17-year-old self.
The interview revealed Cohen to be an avid "foodie," and she also discusses potential college plans.
In her letter, Cohen writes to a younger version of herself who had made the Olympic team and had ambitious hopes, for example, of learning the quad. She stresses that she should not doubt herself, and instead trust herself and her body. (That's very much a simplification). It's quite sweet, but the Cohen excerpt is only a few pages long so I wouldn't recommend the book if she is the only reason you are interested. However, it seems a cute gift for a teenage girl, kind of a similar message as the Don't Sweat the Small Stuff series, with a lot of "believe in yourself" thrown in. I like the inclusion of several athletes.