These book and CD collections are completely compatible with each other and can be played together as ensembles or as solos. Each book contains a carefully edited part that is appropriate for the level 2 or 3 player, as well as a fully orchestrated accompaniment CD. The CD includes a demo track of each song, which features a live instrumental performance, followed by a play-along track. Titles include: 21 Guns; Animal; Boulevard of Broken Dreams; Firework; Grenade; Haven't Met You Yet; In My Head; Just the Way You Are; Need You Now; Rhythm of Love and Smile.