Theme of Secrets was created in 1985.
The Secrets of Peaches and the rest of the books in the series focus primarily on the theme of friendship.
The theme of the book Circle Of Secrets is that being curious isn't going to go away until you find out what you were wondering about
Secrets of the Code was created in 2006.
Secrets of Sound was created in 1992.
Secrets of Soho was created in 2006.
Body of Secrets was created in 2001.
Secrets in the Fire was created in 1995.
Secrets of the Sea was created in 2008.
Secrets of the Sun was created in 1962.
Secrets of the Lamp was created in 1993.
The Source of Secrets was created in 1998.
Vampire Secrets was created in 2006.