Just as Long as We're Together

How can you be best friends with someone who keeps secrets from you - important secrets?

Stephanie's best friend is Rachel. Since second grade they've shared everything, good and bad. Now, as they start seventh grade, Stephanie meets Alison, who has just moved to their neighborhood. Stephanie hopes all three of them can be best friends, because she really likes Alison. But is it possible to have two best friends? Or is it true that two's company, three's a crowd?