Star Trek Excelsior and Captain Sulu

This is an interesting novel by Michael A. Martin and Andy Mangels on some untold history of the Star Trek universe.

The story is about how the two groups of klingons- smooth forehead and ridged forehead became one group of klingons. It is also about how Hikaru Sulu became captain of the USS Excelsior.

Easy reading and fill the gaps of klingon history that starts in the televison series Enterprise, Star Trek classic and The Next Generation.