Tyler, married into an Iranian family herself, tackles the clash of cultures in her 17th novel, when the Very American Bitsy and Brad Donaldson from Baltimore (who have just adopted a Korean baby) strike up an unlikely friendship with an Iranian couple. To complicate matters, the Donaldson's father falls in love with Sami and Ziba Yazdan's mother Maryam.  (IRN48, $24.95)