The years pass by at a fast and steamy clip in Blume’s latest adult novel (Wifey, not reviewed; Smart Women, 1984) as two friends find loyalties and affections tested as they grow into young women. In sixth grade, when Victoria Weaver is asked by new girl Caitlin Somers to spend the summer with her on Martha’s Vineyard, her life changes forever. Victoria, or more commonly Vix, lives in a small house; her brother has muscular dystrophy; her mother is unhappy, and money is scarce. Caitlin, on the other hand, lives part of the year with her wealthy mother Phoebe, who’s just moved to Albuquerque, and summers with her father Lamb, equally affluent, on the Vineyard. The story of how this casual invitation turns the two girls into what they call "Summer sisters" is prefaced with a prologue in which Vix is asked by Caitlin to be her matron of honor. The years in between are related in brief segments by numerous characters, but mostly by Vix. Caitlin, determined never to be ordinary, is always testing the limits, and in adolescence falls hard for Von, an older construction worker, while Vix falls for his friend Bru. Blume knows the way kids and teens speak, but her two female leads are less credible as they reach adulthood. After high school, Caitlin travels the world and can’t understand why Vix, by now at Harvard on a scholarship and determined to have a better life than her mother has had, won’t drop out and join her. Though the wedding briefly revives Vix’s old feelings for Bru, whom Caitlin is marrying, Vix is soon in love with Gus, another old summer friend, and a more compatible match. But Caitlin, whose own demons have been hinted at, will not be so lucky. The dark and light sides of friendship breathlessly explored in a novel best saved for summer beachside reading.