"In my mind it's the third part of a trilogy about power."

It will be the second part of a planned trilogy.

The game was intended to be the first part of a trilogy, but its poor sales placed those plans on hold at the time.

The album is part of a trilogy that was released on March 26, 2012.

The film is also part of a trilogy along with 2 sequels.

It was originally conceived as the first part of a trilogy.

The book is the first part of a trilogy.

Are you doing the third part of his trilogy?

The two films are reportedly part of a "proposed trilogy".

The author's first book, it forms the first part of a trilogy.