The Corinthian Project was a Decide Your Destiny book released in 2007.
Publisher's summary Edit
Join the Doctor and Martha on their travels through time and space and influence the story with your decisions. Choose a direction and let the adventures begin...
When the TARDIS lands in an undersea community known as the Corinthian Project, it doesn't take you long to realise there are some very strange things going on. Explore the Project and see if you can uncover the truth...
to be added