![Introduction to Klingon Grammer](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/7/7e/Introduction_to_Klingon_Grammer.jpg/revision/latest/scale-to-width-down/180?cb=20180907095434&path-prefix=en)
The book on Uhura's lap
Introduction to Klingon Grammer was a textbook on the Klingon language.
It was one of the books used by the crew of the USS Enterprise-A in 2293 to present themselves as a Klingon vessel. (Star Trek VI: The Undiscovered Country)
In an ironic production mistake, the book's title should have been correctly spelled as "Introduction to Klingon Grammar."
The book was a modified version of the 1951 catalog for Alloy Steel Products, Inc. [1]