" Kiss the Girls " is a 1995 thriller novel by James Patterson featuring Dr. Alex Cross hunting a serial kidnapper known as Casanova, which was adapted into a 1997 film starring Morgan Freeman. The story centers on Cross searching for his niece and Dr. Kate McTiernan, who escapes a "twinning" partnership involving two killers.
You can learn more about this thriller on Amazon or the Wikipedia page for the novel . Kiss the Girls