This enjoyable double concerto consists of two larger movements, “Quiet Thoughts, Violent Thoughts and Concerns” and “Joyful Thoughts,” preceded and separated by a Prelude and an Interlude. It was written in 2010 for the Polish percussion duo Hob-beats. The Prelude is for only the two soloists and presents the most difficult playing: very fast, almost perpetual running sixteenth notes, switching frequently between 3/4, 11/16, and 2/4. Several passages include interlocking rhythms between the players. The first movement includes more fast runs in the solo parts as well as the orchestra (in the edition under review, piano), but not the tricky meter changes or hocketing patterns of the Prelude. The harmonies are highly chromatic and presented in a very “slippery” manner, creating a wonderful atmosphere that manages to make even the aggressive parallel minor second passages sound charming. Honestly I do not get a sense of the violent thoughts implied by the movement’s title. The brief Interlude continues the highly chromatic, slippery textures, but in a slower, simpler fashion, with a subdued, long melody underneath. The finale consists almost completely of a repeating two-beat, syncopated rhythm, with occasional flourishes of fast melody riding on top. This is frequently passed between soloists and the orchestra. While incessantly repetitive, and not nearly as harmonically adventurous as the previous movements, “Joyful Thoughts” nails the attitude and character of its title. Overall the piece is not staking new ground in any way, but is a contemporary work that will please even more traditional audiences. It is a good addition to the percussion concerto repertoire because it is not too terribly difficult and it is fun to play.