Star Trek books and comic books are not considered part of canon, unfortunately. If that were the case, Captain Kirk and Trip Tucker would both still be alive and Captain Benjamin Sisko would be back from the Bajoran Prophets. And quite frankly, those are three solid reasons to bring the comic books into canon. Star Trek: Day of Blood even took one character down a uniquely different path than his father and even corrected the direction the writers from both Star Trek: The Next Generation and Star Trek: Deep Space Nine had taken him. The comic book gives a solid performance and is one of the main reasons why these books should be a part of canon.
In Star Trek: The Next Generation, Worf's {Michael Dorn] son, Alexander, was a defiant kid who didn't want to be a warrior like his father. He spent some time on Earth with his grandparents but was brought back to Worf when they decided they couldn't handle him. But his return to the Enterprise didn't correct his behavior, and things only went from bad to worse with Alexander when he was almost killed in a fire in the ship's biolab.
In Star Trek: Deep Space Nine, Alexander's path wasn't any easier. He'd joined the Klingon Defense Forces but struggled to integrate with other Klingons. His relationship with his father was tense, with Alexander accusing Worf of never accepting him. Though he finally found connection aboard the Rotarran as well as a relationship with his father, Star Trek: Day of Blood told a different story for the boy, one in which he fell prey to Kahless' schemes in an alternate universe. Fortunately, the tale had a positive outcome for Worf's son, and the young Klingon finally found his purpose in life.
Showing an aptitude for medicine, Alexander, after having some troubles that could have landed him in the brig for a very long time, ended up agreeing to practice medicine for the Federation. As a doctor, Alexander would take a different role than that of any other Klingon we've known with the exception of Antaak, a doctor who appeared in Star Trek: Enterprise. Hopefully, Alexander continues his journey into medicine by focusing on healing rather than Antaak's almost disastrous route. It's storylines like this that make it a shame the comic books are not canon!