Training Ground, book one of the Girls of Summer series, introduced Emma Blakeley and Jamie Maxwell, two young athletes with seemingly bright soccer futures. Now, in book two, those futures are upon them. It's late 2013, and the world's best soccer players are gearing up for the 2015 World Cup. In London, Jamie has just completed her third season with Arsenal Ladies F.C. Only one soccer dream still eludes her: a spot on the US women's national team. Emma, a national team regular, plays professionally in Seattle with the NWSL, the most recent incarnation of American women's pro soccer. When...