The E-Space Trilogy contains the following:

Full Circle: The Doctor discovers the TARDIS has fallen into E-Space and landed on the planet Alzarius. Its only inhabitants live on a vast, dilapidated spaceship which they have been attempting to repair for generations in order to return to their home planet. But Mistfall, a legendary time of terror, is coming again to Alzarius, and an eerie menace is rising out of the misty marshes. The Doctor and Romana must solve the riddle of the strange Marshmen if they are to have any chance of returning to their own universe.
State of Decay: Searching for a way out of E-Space, the Doctor and Romana, joined by a young stowaway, land on an Earth-like planet. Here the people live in fear of 'the Three who Rule'; cruel lords who live in a high tower overlooking their village. Suppressing all learning to keep their subjects ignorant and helpless, what chilling secret are these ruthless monarchs concealing? An ancient evil is rising once again and only the Doctor and Romana can destroy it.

Warriors’ Gate: A strange creature forces its way into the TARDIS steering them to a white void occupied only by the ruins of an old building and a spaceship. This empty space is a gateway to the past and future and the creature responsible for taking them there is Biroc, a Tharil, an enslaved race. The gateway offers the only exit out of E-Sapce, but the void is contracting. Are the Doctor and his friends fated to spend eternity in E-Space? And what final shock revelation awaits the Doctor?

The E-Space Trilogy contains the following: