The Cubicle 7 game has gone through a number of iterations over a good number of years, with it often going out of print partially for a while. The newest version has Thirteen on the cover. Earlier ones included Twelve and Ten. On the core rulebook. I’ve had it since the David Tennant cover, and got a good number of the incarnation-specific books. Though those are more about adventuring in the TV stories and with the TV companions for each incarnation. There are also separate setting/adventure books.