There are 5 books in the Diary of a Teenage Girl - Caitlin series.
The Diary of a Teenage Girl - Caitlin series does not have a new book coming out soon. The latest book, I Do (Book 5), was published in January 2005.
The first book in the Diary of a Teenage Girl - Caitlin series, Becoming Me, was published in August 2000.
The Diary of a Teenage Girl - Caitlin series primarily falls into the Christian genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.