From the back of the book: The boundaries are set only by your imagination as you enter one of the most amazing inventions of Federation technology--the holodeck. It's a roleplaying game within a game, as your Star Trek(R) characters take on the roles from other times and places. They can even become your favorite characters from other RPGs! Holodeck Adventures provides the perfect way to get other roleplayers into your Star Trek game, or to give existing Star Trek gamers a refreshing change of pace.