The book provides musical score and parts for a spy-themed jazz composition. The piece, titled "Mission: Secret," is structured as a 12-bar blues and features a prominent bass line riff complemented by a simple, sustained melody. It includes written-out solos for trumpet and horn, with the option for improvisation using a C concert blues scale.

This musical score is designed for instrumental ensembles, likely jazz or concert bands, focusing on a bluesy spy theme. The inclusion of both written solos and improvisation suggestions caters to varying skill levels and performance styles. The composition's structure and melodic elements suggest an accessible yet engaging piece for musicians.