Of course DS9#17 still takes the title of having two titles for the same book in print at the same time, since you have the book title The Heart Of The Warrior, but then you open the book to the Historian's Note which states:
The Trojan Spaceship takes place in the fourth season of STAR TREK: DEEP SPACE NINE.
And of course you are left wondering when you read the book whether you are reading the right book or if the publisher accidentally put the wrong cover on the book pages.
Or, more likely, they changed the title at the last minute and somebody forgot to update the Historian's Note . . . .