The Book of Confessions, containing historical statements of what we as a church believe, is available in several forms.
You can download:
The Book of Confessions in English 
Libro de Confesiones en Español (2016 version coming soon)
The Book of Confessions in Korean (2016 version coming soon)
O Livro de Confissões in Portuguese (2016 version coming soon)
You can use this searchable online version, or you can purchase a printed version from Presbyterian Distribution Service.