1. "A Thousand Splendid Suns, by Khaled Hosseini (Riverhead, $25.95). A friendship between two women in Afghanistan against the backdrop of 30 years of war; from the author of "The Kite Runner."
2 "Lean Mean Thirteen," by Janet Evanovich (St. Martin's, $27.95). The New Jersey bounty hunter Stephanie Plum becomes a suspect when her ex-husband disappears.
3. "Bungalow 2," by Danielle Steel (Delacorte, $27). A writer must deal with the effects of Hollywood success on her family life.
4. "Double Take," by Catherine Coulter (Putnam, $25.95). Dillon Savich and Lacey Sherlock - F.B.I. agents as well as husband and wife - join with a San Francisco colleague to solve a murder and find a missing woman.
5. "Drop Dead Beautiful," by Jackie Collins (St. Martin's, $24.95). Lucky Santangelo's preparations for the opening of a Las Vegas hotel complex are complicated by the reappearance of an old family foe.