(Piano/Vocal/Guitar Artist Songbook). The 2015 album release by these a cappella masters and winners of NBC's The Sing Off topped the Billboard 200 album charts and features all original material. Our matching songbook features piano/vocal/guitar arrangements with the piano part covering all the vocal harmonies for all 16 songs from the CD, including: Can't Sleep Love * Cracked * If I Ever Fall in Love * Ref * Sing * Take Me Home * and more.