The Flex-Ability series, arranged by Victor Lopez, fills the need for multi-level instrumentalists to play popular music together. Each instrument book includes 11 songs in four-part score form. The songs are: La Bamba * When the Saints Go Marching In * Eye of the Tiger * Peter Gunn * In the Midnight Hour * China Grove * Jeepers Creepers * Soul Man * Sweet Georgia Brown * Frosty the Snowman * Celebration.