Star Trek: The Next Generation: Starfleet Academy, book 11 : Crossfire
John Vornholt1996

Will Riker believed it was an honor to belong to the Starfleet Academy Band, a position few first-year cadets achieve. He becomes friends with fellow cadet Geordi La Forge, the band's roadie, who looks forward to visiting exotic planets and hanging out with the band. But Riker isn't so sure. He's tired of being the butt of practical jokes -- standard treatment for all band newcomers -- and threatens to quit.

Then comes the big competition on the beautiful resort planet of Pacifica. The Starfleet Academy Band is so good that they attract the unwanted attention of an alien warship. They are given a choice: perform for alien troops or be destroyed.

But when the cadets arrive on war-torn Elofim, they're caught in the crossfire with no escape. Suddenly, Riker isn't worrying about leaving the band. Instead, he and Geordi have to find a way off Elofim -- alive!