The number of live titles in your library's Credo subscription is listed in the search bar of your Credo home page, in the format "Searching 3,408,892 full text entries in 650 reference books." This title count is updated in real time, as soon as titles are added to your subscription. You can also find this number on the "Find a Book" page and the Advanced Search page of your account.
If you'd like to be notified when titles are added, updated, or retired, just contact support@credoreference.com and ask to be added to our monthly "Catching up with Credo" email list. These content updates are hosted in our Help Center.