In 2256, this book was stored on a bookshelf in the USS Shenzhou's ready room. (DIS: "The Vulcan Hello") A photo of this bookshelf appeared in the Twitter account of Star Trek: Enterprise producer Aaron Baiers. The title of this book, and other books on the shelf, are Original Series episode titles, and were described as "Easter eggs for all Trek lovers". [1] However, the shelf as it appeared on screen counted fewer books, and since the titles were not obviously readable, it is unclear which were removed and which remained. This book's title refers to the episode "Balance of Terror" .