The first three Alex Cross book are "Along Came a Spider", "Kiss the Girls" and "Jack & Jill". The Alex Cross series was written by James Patterson.
The Alex Cross books are a crime thriller series about a widowed detective trying to fight high-profile criminals and villains while maintaining his family life and protecting his children. The series follows Cross as he attempts to solve mysterious crimes, take down killers and terrorists, and find the murderer who killed his wife, Maria.
The first Alex Cross novel was published in 1993 and following positive reviews, Patterson continued to add to the series. As of June 2015, the series consists of 21 books, with another scheduled to be released on Nov. 23, 2015.