A reader

Henry Shaw, a high school senior, is about as comfortable with his family as any 17-year-old can be. His father, Kevin, teaches history with a decidedly socialist tinge at the Chicago school Henry and his sister attend. His mother, Beth, who plays the piano in a group specializing in antique music, is a loving, attentive wife and parent. Henry even accepts the offbeat behavior of his 13-year-old sister, Elvira, who is obsessed with Civil War reenactments and insists on dressing in handmade Union uniforms at inopportune times. When he stumbles on his mother's email account, however, Henry realizes that all is not as it seems....